Levels Of Potassium Fertilization Research Articles

Response of Soil Chemical Properties, Performance and Quality of Sweet Potato (Ipomoea Batatas L.) to Different Levels of K Fertilizer on a Tropical Alfisol

Background:The optimum rate of nutrient must be defined with reference to soil properties for individual crops and soil.Objective:Field experiments were carried out in 2015 and 2016 cropping seasons to determine the various levels (0, 40, 80, 120 and 160 kg ha-1) of potassium fertilizer (muriate of potash , KCl), on soil chemical properties, leaf nutrient contents, performance and proximate quality of sweet potatoes (Ipomoea batatasL.).Method:The five treatments were arranged in a randomized complete block design with three replicates.Results:Studies showed that K fertilizer in both the years significantly influenced N, P and K concentrations compared with the control and also increased the soil concentrations of these nutrients from 0 - 160 kg ha-1K fertilizer. However, soil K only increased up to 80 kg ha-1fertilizer after which there was a decrease. There was a reduction in the values of Ca and Mg in the soil as the levels of K increased. Leaf nutrient concentration of the sweet potato was consistent with the values of soil chemical properties recorded. 80 kg ha-1K fertilizer was observed to be the highest value of sweet potato growth and tuber yield after which there was a reduction. The yield decrease was adduced to excessive K application leading to imbalanced sweet potato plant nutrition compared with N, P, Ca and Mg. K fertilizer significantly influenced moisture, vitamin C and carbohydrate compared with the control. The highest values of fibre and protein were obtained at 80 and 40 kg ha-1K fertilizer, respectively. Dry matter and fat contents of the sweet potato reduced by K application from 0 - 160 kg ha-1application rate.Conclusion:For best tuber yield, quality and economic response of K fertilizer to the sweet potato in the agro-ecological zone or in other similar soil conditions elsewhere in the tropics could be achieved by applying 80 kg ha-1K fertilizer.

Response of Newly Introduced Tomato Cultivars to different levels of potassium fertilizer under controlled Environment condition

The experiment was carried out during growing season (2016-2017) at station of greenhouses, AL-muthanna university- collage of agriculture- second research station (Al-Bander) to study the response of introduced tomato cultivars to different concentrations of potassium under protected agriculture conditions. The research included three cultivars (Pusa ruby - Arka vikash- Arka Alok) and three levels of Potassium Fertilizer (90-180-270 kg/ha-1). The Randomized Complete Block Design with factorial experiment (RCBD) with three replicates. The results showed the superiority of Arka Alok variety over others in plant height 121.76 cm, fruit width 6.82 cm, fruit length 4.23 cm, average fruit weight 130.61g, leaf area 129.5 cm2, the yield per plant 2.16 kg. The potassium level (270 Kg/ha-1) was also significantly higher in plant height 118.79 cm, fruit width 5.477 cm, fruit length 3.536 cm, 84.60 g, leaf area 127.3 cm2, TSS 4.97 and chlorophyll content 406.89 mg.m2 and yield per plant 2.16 kg. While the interaction showed significant difference (Arka Alok × 270 Kg.ha-1) in fruit length was 4.24 cm, chlorophyll content was 374.91 mg. m2 and the yield per plant was 2.82 kg. plant-1

Study of growth and yield of maize (Zea mays L.) under levels of nitrogen and potassium fertilization

A field experiment was conducted during the autumn season 2018 at Al- Zinawiya site 10 km south-east of center Al- Nasiriya Governorate, to determine the effect of four levels of Nitrogen fertilizer (0.120,180 and 240 kg N ha-1) and four levels of Potassium fertilizer (0,80,120 and 160 kg K ha-1) and The interaction between them, on growth and yield of corn (Zea mays L.) Fajer-1 variety. Factorial experiment according to Randomized complete block design (R.C.B.D) was used in this study with three replicates The results showed the level 240 kg N ha-1 achieved significant superiority in the Days to Tasselling, Days to silking, Plant height, Leaf area, number of grains per ear, weight 500 grain, grain yield, the concentration of nitrogen and potassium in leaves (54.09 Days, 57.58 Days, 166.17cm, 399.29cm2, 404.83per ear-1, 158.20gm, 6.702t h-1, 1.46Mg gm-1, 1.28Mg gm-1 respectively). The level of 160 kg K-1 was significant superior among other levels by giving the best results of studied characters, (Days to Tasselling, Days to silking, Plant height, Leaf area, number of grains per ear, grain yield and the concentration of nitrogen in the leaves.) (54.09 Days, 57.58days, 138.42cm, 338.05 cm2, 338.58 per ear, 5.250 t h-1, 1.44Mg gm-1 respectively). The interaction for the treatment (240 kg N h-1 + 160 kg K h-1) was superior grain number of per ear (430.00), weight 500 grain (160.40 gm), and grain yield (7.060 t h-1).

Effect iron chelated and potassium fertilization on growth and yield of wheat Triticum aestivum L.

A field experiment was carried in two locations (Nasr and Eslah) in Thi Qar province during winter season (2015 – 2016). the experience included study two factors which of three concentrations of iron chelated (0-50-100 mg L-1) spray on leaves before flowering period , and three levels of potassium fertilizer ( 0- 50-100 K2O kg h-1) The experiment was designed by using randomized complete blocks design with three replication (RCBD) with three replications. Results showed that the iron chelated treatments had a significant effect on growth traits in both of Nasr and Eslah locations , the treatment of concentration of 100 mg/ L get higher values for growth traits plant height 88-85 cm and the number of tillers / plant 12-10 Tillers, area flag leaf 25.6-25.5 cm2 and yield grain 6.04-5.97 t / h in Nasr and Eslah, respectively, while potassium treatment had a significant effect on growth traits in both of locations, the treatment 100 kg K2O h -1 gave higher values for growth traits area flag leaf reached 28-27.1 cm2 and gave the highest values of the attributes of yield the components and yield grain 6.00-5.9 t / h in Nasr site and Eslah, respectively . The combination treatment (100 mg Fe with 100 kg K2O) gave the highest mean properties of the yield components, number of spikes, number of grains per spike, and grain yield compared to the control treatmentCorresponding author: E-mail(ragheb.hadi@yahoo.com) Al- Muthanna University All rights reserved

Effect of Different Levels of Potassium Fertilizer on Yield and Fruit Quality of Old Trees of "Balady" Orange A: Effect of Different Levels of Potassium Fertilizer on Some Physical Prop-erties and Yield Parameters of "Balady" Orange

Effect of Different Levels of Potassium Fertilizer on Yield and Fruit Quality of Old Trees of "Balady" Orange A: Effect of Different Levels of Potassium Fertilizer on Some Physical Prop-erties and Yield Parameters of "Balady" Orange

Intercropping Systems of Sunflower with Peanut under Different Irrigation Regimes and Potassium Fertilizer Levels

TWO FIELD experiments were conducted at the research farm of Ismailia Governorate, Egypt during 2016 and 2017 summer seasons. This study was used to determine the suitable spatial arrangement of sunflower and peanut in an intercropping system under three irrigation water levels and three fertilizer (K) levels on yield, the land and water equivalent ratios and farmer's net income.The three irrigation treatments (0.7, 1.0 and 1.2ETo), the three K fertilizer levels (57, 86 and 114K2O kg/ha) and the four intercropping systems of sunflower and peanut (different spatial arrangements) were arranged in a strip split plot with three replications.The results indicated that application of 1.0 and 1.2ETo had similar effect on most of yield traits of the intercrops. Application of 114K2O kg/ha had the highest values of most yield traits of the intercrops. Intercropping sunflower with peanut (S1), where peanut seeds were sown on both sides of all the raised beds, sunflower seeds were sown on one row above the raised beds and the following bed was left without intercropping gave the highest values of peanut and sunflower yield and its attributes.In conclusion, the highest yield, land and water equivalent ratios, as well as farmer's net income can be obtained under 1.2ETo, 114K2O kg/ha and S1 intercropping system.

The Effect of Organic and Mineral Fertilization on The Values of Soluble Potassium Inside and Outside Rhizosphere of Zea Maize (zea mays L.)

A field experiment is carried out in a private farmer's farm located in AL-Qadisiyah/ Diwaniyah/ Daghara/ Sadr Al-Daghara area to study the effect of organic and mineral fertilizers on dissolved potassium values inside and outside Zea maize rhizosphere. The randomized complete block design (RCBD) is designed in three replicates with two factors: the first is factor with four levels of potassium sulphate which are (0, 75, 150, 225) kg K. ha-1 symbolized by the symbols (K0, K1, K2, K3) respectively, and the second factor with four levels of organic matter (poultry residues) which are (0, 10, 20, 30) tons. ha-1 symbolized by the symbols (O0, O1, O2, O3) respectively. The seeds of Zea maize (Zea mays L.) are cultivated in the form of lines (DKC 6120) 20/7/2016. The results show that the addition of potassium sulphate in different levels has achieved a significant increase in the amount of soluble potassium inside and outside the soil of the root zone and for all time periods (40,70,100) days of planting and the mineral fertilizer has exceeded the organic fertilizer in increasing the amount of soluble potassium and the interaction between the highest level of potassium fertilizer 225 kg k. ha-1 and the highest level of organic fertilizer 30 tons. ha-1 (K3O3) achieves the highest amount of soluble potassium within the root zone which amounted to (0.131,0.163) cmol.kg soil-1 respectively, and (0.179,0.167) cmol.kg soil-1 outside the root zone respectively for the periods (40,70) days of planting respectively, while after 100 days of planting the interaction (K2O3‌) achieved the highest amount of soluble potassium which is amounted to 0.114 cmol.kg soil-1 inside the root zone and the interaction (K3O3) achieves the highest amount of soluble potassium which is amounted to 0.159 cmol.kg soil-1 outside the root zone and a decrease in the amount of soluble potassium in all treatments is noticed with the increase of plant growth time. .

Economic Competitiveness of Napier Grass in Irrigated and Non-irrigated Georgia Coastal Plain Cropping Systems

Interest and focus on development of renewable biofuels has been increasing over the past decade leading to the introduction of a wide cadre of renewable feedstocks. As a result, numerous perennial warm-season grasses have been introduced and management practices evaluated to determine their suitability as biofuel feedstocks. “Merkeron” napier grass (Pennisetum purpureum) plots were established in 2010 and harvested during crop years 2011 through 2015 adjacent to an on-going peanut (Arachis hypogaea L.), corn (Zea mays L.), and cotton (Gossypium hirsutum L.) cropping systems study conducted at the USDA/ARS Multi-crop Irrigation Research Farm in Shellman, GA (84 36 W, 30 44 N) on a Greenville fine sandy loam (fine, kaolinitic, thermic Rhodic Kandiudults). Napier grass was produced in both non-irrigated and two irrigated levels with different levels of nitrogen and potassium fertilizers. Peanut, corn, and cotton were produced in non-irrigated and full irrigation regimes. Breakeven prices for napier grass ranged from $65 to $84 Mg−1 at variable and total costs. The breakeven napier grass price was estimated such that the net returns were equal between napier grass and peanut, cotton, corn cropping systems. At variable production cost, comparative breakeven napier grass prices for non-irrigated, 50% irrigated, and full irrigated regimes were $77, $117, and $112 Mg−1, respectively. Napier grass did not compete economically against traditional irrigated cropping systems. Depending on traditional crop prices and bioenergy feed stock prices, napier grass could offer economic opportunities in non-irrigated production environments, riparian buffer zone edges, or non-cropped marginal production areas.

Development and production of fertigated coffee trees in the west region of Bahia, Brazil

The aim in the present study was to evaluate the effects of different split fertigation and doses on the development and production of drip irrigated coffee in the western region of the state of Bahia, Brazil. The study was performed at the Café do Rio Branco Farm, in Barreiras, BA, Brazil, in adult coffee trees aged approximately 3.5 years from the variety <em>Catuaí IAC 144</em>. A 3 x 3 factorial design was adopted, with three levels of nitrogen and potassium fertilization (900/800, 600/500 and 300/250 kg ha<sup>-1</sup> year<sup>-1</sup> N and K<sub>2</sub>O) in three monthly split fertigation (two, four and eight times). Stem and crown growth, productivity, yield and sieve were evaluated. The doses of 600/500 and 900/800 kg ha<sup>-1</sup> year<sup>-1</sup> N/K<sub>2</sub>O and the splits in two and eight times provided the highest productivities of coffee. A higher split fertigation was observed on the effect of N and K<sub>2</sub>O doses in coffee development variables (crown diameter and plant height). There was no effect of split fertigation and doses in the classification by sieves of coffee beans.

Effect of Organic and Mineral Fertilization on The Values of Soluble Potassium Insideand Outside Rhizosphere of ZeaMaize (zea mays L.)


 
 
 
 A field experiment was carried out in a private farmer's farm located in AL-Qadisiyah/ Diwaniyah/ Daghara/ Sadr Al-Daghara area to study the effect of organic and mineral fertilizers on dissolved potassium values ​​inside and outsideZea maize rhizosphere. randomized complete block design (RCBD) was designed in three replicates and included two factors: the first factor with four levels of potassiumsulphatewhich are (0, 75, 150, 225) kg K. ha-1symbolized by the symbols (K0, K1, K2, K3) Respectively, and the second factor with four levelsof organic matter (poultry residues) which are (0, 10, 20, 30) tons. ha-1 symbolized by the symbols (O0, O1, O2, O3) Respectively, the seeds of Zeamaize (Zea mays L.) were cultivated in the form of lines (DKC 6120) in the form of lines on 20/7/2016.
 
 
 
 
 The results showed that the addition of potassium sulphate in different levels has achieved a significant increase in the amount of soluble potassium inside and outside the soil of the root zone and for all time periods (40,70,100) days of planting and the mineral fertilizer has exceeded the organic fertilizer in increasing the amount of soluble potassium and the interaction between the highest level of potassium fertilizer 225 kg k. ha-1 and the highest level of organic fertilizer 30 tons. ha-1 (K3O3) achieved the highest amount of soluble potassium within the root zone which amounted to (0.131,0.163) cmol.kg soil-1respectively, and (0.179,0.167) cmol.kg soil-1 outside the root zone respectivelyfor the periods (40,70) days of planting respectively, while after 100 days of planting the interaction (K2O3­) achieved the highest amount of soluble potassium amounted to 0.114 cmol.kg soil-1inside the root zone andtheinteraction (K3O3) achieved the highest amount of soluble potassium amounted to 0.159 cmol.kg soil-1 outside the root zone and a decrease in the amount of soluble potassium and for all treatment is noticed with the increase of plant growth time

Enhancing Yield, Quality and Profitability of Sugar Beet Combining Potassium Fertilizer and Application Date of Yeast

GOOD fertilizer management is critical for high yielding, quality and profitability of sugar beet. This work was carried out at Mallawi Agric. Res., Station, El-Minia Governorate, Egypt, during 2012/2013 and 2013/2014 seasons to study effect of three application dates of yeast, i.e., 80, 110 and 140 days of sowing and three levels of potassium fertilizer, i.e., 0, 24, 48 kg K2O/fad on vegetative, physiochemical, yield traits and profitability of sugar beet. A split plot design with four replications was used in both seasons and Monetbianco cultivar was sown.The obtained results indicated that addition time of yeast or/and level of potassium fertilizer (kg K2O/fad) exhibited a significant effect on vegetative characters of beet roots. Physical properties of beet roots, such as SR (Sugar recovery) %, QZ (Quality index) % and SL (Sugar loss) %, chemical constituents (pol (polarization) %, K, Na and a-N determined as milliequivalent/100 g beet), except the 2nd season for Na content of beet roots not reached significant level, and productivity traits of sugar beet, i.e., roots yield and recoverable sugar yield (ton/fad) in both growing seasons and combined.The interaction between addition time of yeast with K-fertilization level was significant on vegetative traits of sugar beet, physical properties of beet roots, chemical constituents and productivity traits of sugar beet.Yeast addition at age 80 days was markedly increased the total return per fad by 27.64 and 26.85% and net profit by 60.80 and 58.64% as well as sugar yield in ton/1000m3 by 7.14 and 0.84 % compared with applying yeast at ages 110 and 140 days, respectively.In general, it can be concluded from the results that applying yeast at age 80 days from sowing with 24 kg K2O/fad could be recommended because it achieved the maximum values of SR% (16.27%), QZ (86.99%) and pol % (18.71), while it contained the lowest values of SL% (2.44 %) ɑ-N (1.24 milliequivalent/100 g) and Na (1.31 milliequivalent/100 g) contents. While, the highest values (4.73 and 4.78 ton/fad) for recoverable sugar yield of sugar beet was recorded with adding yeast at ages 80 and 140 days from sowing with 24 kg K2O/fad, respectively.

Effect of Yeast Rates and Potassium Fertilization on Yield and Quality of Some Sugar Beet Varieties

A field experiment was conducted at the Agronomy Department Experimental Farm, Agriculture Faculty, Assiut University, Egypt. During 2015/2016 and 2016/2017 seasons to study the effect of yeast rates and potassium fertilization on yield and quality of some sugar beet varieties. The experiment was laid out in randomized complete block design (RCBD) using strip split plot arrangement with three replications. Yeast foliar application rates (0,1,2 and 3 kg fed. -1) was arranged horizontally, while potassium fertilization levels (12.5, 25 and 37.5 kg K2O fed.-1) were distributed in vertically, as well as sugar beet varieties (kawemira, Romulus and Glorius) were arranged in sub plots. The obtained results revealed that yeast foliar application at the rate of 3.0 kg wet yeast fed.-1 recorded the highest significant mean values of root length, root diameter, single root weight, root yield fed.-1, pol percentage, sugar recovery percentage and recoverable sugar yield (ton fed.-1) traits in the two growing seasons. Furthermore, the obtained results detected that the studied potassium fertilization levels had a significant effect in the all studied traits in the two growing seasons in favor of 37.5 kg K2O fed.-1. Here too, kawemira sugar beet variety gave the highest mean values of previous traits in both seasons. In addition, the obtained results revealed that the all first and second order interactions involved in this respect had a significant influence on all studied traits. Moreover, kawemira sugar beet variety which sprayed with 3 kg yeast fed.-1 and fertilized with 37.5 kg K2O fed.-1 produced the maximum mean values of all studied traits in both seasons.

Phloem transport capacity of transgenic rice T1c-19 (Cry1C*) under several potassium fertilizer levels.

Genetic modification of Cry-proteins from Bacillus thuringiensis (Bt) is a common practice in economically important crops to improve insecticide resistance and reduce the use of pesticides. However, introduction of these genes can have unintended side effects, which should be closely monitored for effective breeding and crop management. To determine the potential cause of these negative effects, we explored assimilate partitioning in the transgenic Bt rice line T1c-19 (Cry1C*), which was compared with that of its wild-type counterpart Minghui 63 (MH63) under different potassium fertilization application treatment conditions. In a pot experiment, 0, 0.4, and 0.6 g K2O was applied per kg of dry soil to determine the phloem transport characteristics of the two rice lines. We used a variety of assessment indicators ranging from morphological to physiological aspects, including the number of large and small vascular bundles in the neck internode at the heading stage, the diameter and bleeding intensity of the neck internode at the filling stage, and the content and apparent ratio of transferred non-structural carbohydrates (NSC) in the culm and sheath from the heading to maturing stages. The K utilization and grain yield at the maturing stage were also concerned. Results presented that the mean setting rate and grain yield of T1c-19 (Cry1C*) decreased by 22.3% and 26.2% compared to those in MH63, respectively. Compared to MH63, the K concentration and accumulation were significantly higher in the culms and leaves, but significantly lower in grain of T1c-19 (Cry1C*). T1c-19 (Cry1C*) had less apparent NSC efflux in the culm and sheath, fewer small vascular bundles, and a smaller diameter and bleeding intensity of the neck internode than MH63. In addition, linear correlation analysis indicated that there were positive correlations among grain yield, setting rate, the apparent NSC efflux in the culm and sheath, number of small vascular bundles, and the neck internode diameter and bleeding intensity. These unintended effects may directly or indirectly be caused by insertion of exogenous Bt (Cry1C*) gene, which should be further considered in the future breeding of transgenic crops.

Soybean agronomic performance in response to seeding rate and phosphate and potassium fertilization

ABSTRACT Most studies that found soybean high phenotypic plasticity under different seeding rates adopted the same fertilization levels used for the recommended seeding rates. Therefore, the interaction between these factors is little known. This study aims to assess the interaction between seeding rate and levels of phosphorus and potassium fertilization on soybean growth, grain yield and contents of protein and oil in the grains. The experiment was carried out under a randomized complete block design, in a split-plot scheme, with six replicates. Four seeding rates (150, 300, 440 and 560 thousand viable seeds ha-1) were used in the plots, and two levels of phosphorus and potassium fertilizer were applied in the subplots to meet the export of 3 and 6 t ha-1 of grains (level 1 = 30 kg ha-1 of P2O5 + 60 kg ha-1 of K2O; and level 2 = 60 kg ha-1 of P2O5 + 120 kg ha-1 of K2O). There was no interaction between the experimental factors. Increase in fertilizer doses did not alter the evaluated characteristics, regardless of the seeding rate. Seeding rate did not change grain yield or protein and oil contents, but at low densities there was an increase in the number of pods per plant, apparent harvest index and SPAD index.

Effects of different levels of potassium fertilization on yield, quality and storage life of onion (Allium cepa L.) at Jimma, Southwestern Ethiopia.

In Ethiopia the yield of Onion (Allium cepa L.) is far below the national standards owing to several factors; absence of location specific fertilizer recommendation being the major among others. Thus, field and laboratory experiments were undertaken at Jimma in collaboration with Jimma University, Department of Post-harvest Management. Potassium sulphate fertilizer as TSP was used at 0, 40, 80 and 120 kg ha-1 levels with three replications. GenStat 12.1 version computer software packages were employed to analyze the data. From the results potassium fertilizer application at different levels showed significant effects on growth, yield and quality parameters i.e. Plant height, leaf length, leaf number, sheath length, bolters percentage, days to maturity, harvest index, mean bulb weight, bulb length, bulb diameter, TSS (oBrix), DMC (%) and bulb shape index. Similarly, keeping quality of the onion bulbs including bulb sprouts (%), weight loss (%), weeks to 50% bulb sprouts and storage rots (%) were highly influenced by application of K at different levels. Maximum (120 kgha-1) application of potassium significantly decreased bulb rots (%), bulb sprouts (%), weight loss (%) and prolonged weeks to 50% bulb sprout during the two month storage time at ambient storage temperature and humidity. This could be recommended for the uses by potential onion investors or farmers in the study area. Nevertheless, more researches are needed in different locations and on different soils in various season to come up with specific soil test based fertilizer recommendation.

Yield, Quality and Natural Infestation with Insect and Disease of Four Sugarcane Varieties as Affected by Different Levels of Potassium Fertilization

The present experiments were carried out in El-Mattana Research Station (latitude of 25.25°N and longitude of 32.31°E), AgriculturalResearchCenter, Luxor Governorate, Egypt. The present work was conducted on two plant cane crops grown in 2015/2016 and 2016/2017 seasons to study the yield, quality and natural of infestation with lesser sugarcane borer, Chilo agamemnon Bles., and pokkah boeng disease (Fusarium moniliforme Sheldon) and other diseases of four sugarcane varieties (G.T.54-9, G.2003-47, Ph 8013 and C. 57-14) as affected by three levels of potassium fertilization (zero, 24 and 48 kg K2O/fed.). The results showed that the difference in mostly traits between sugarcane variety G.T.54-9 and G.2003-47 was insignificant, they surpassed the other two varieties in number of millable canes and cane and sugar yield/fed. Also, they recorded the highest percentages of infestation with C. agamemnon Bles., and pokkah boeng, during the two successive seasons. The sugarcane variety Ph 8013 showed significant superiority in stalk weight, sucrose% and sugar recovery%. However, the variance between the two sugarcane varieties namely Ph 8013 and G.2003-47 in sucrose% and sugar recovery% was insignificant. Increasing the applied dose of potassium fertilizer up to 48 kg K2O/fed. was accompanied by a significant increase in the values of number of millable canes, stalk weight/plant and sugar yields as well as decreased of percentage of infestation with C. agamemnon Bles., and pokkah boeng disease, during the two successive seasons. However, the variance between 24 and 48 K2O/fed. in sucrose%, sugar recovery% and cane yields/fed. was insignificant during the two successive seasons. Fertilizing sugar cane crop by 24 and 48 kg K2O/fed. increased cane yield by 6.47 % & 7.51 % during the first season and 4.51 % & 11.34 % during the second season, respectively, compared with check treatment.

Evaluation of Different Levels of Potassium and Zinc Fertilizer on the Growth and Yield of Wheat

Evaluation of Different Levels of Potassium and Zinc Fertilizer on the Growth and Yield of Wheat

EFFECT OF GAMMA IRRADIATION AND POTASSIUM FERTILIZATION ON GRIDGETH AND PRODUCTIVITY OF BORAGE (Borago officinalis L.) PLANT

The present study was carried out at Nuclear Research Center, Atomic Energy Authority, Inshas, Sharkia Governorate, Egypt, during the two consecutive seasons of 2013/2014 and 2014/2015 to study the effect of using different gamma irradiation doses, potassium fertilization levels and their interaction treatments on gridgeth, yield components, fixed oil percentage and leaf green color degree (SPAD-unit) of borage (Borago officinalis, L.) plant. The used gamma irradiation treatments were 0 (control), 2, 4, 6, 8 and 10 kilo rad (kr). Whereas, potassium fertilization levels were 0 (without K addition), 50 and 100 kg potassium sulphate/faddan, each treatment of gamma irradiation doses was combined with each level of potassium fertilization to form 18 interaction treatments. The obtained results cleared that using gamma irradiation dose of 2 kr increased most values of plant height, dry weight of herb per plant, number of inflorescences per plant, seed yield per plant and per faddan, fixed oil percentage and leaf green color degree. Furthermore, the maximum increase in this respect was obtained from the potassium fertilization treatment of 100 kg potassium sulphate/faddan compared with the other ones under study. Generally, the interaction treatment between 2 kr of gamma irradiation with 100 kg potassium sulphate/faddan of potassium fertilization mostly gave the maximum increase in the above mentioned parameters. Therefore, it seems to be recommended treatment under Sharkia Governorate conditions. Moreover, potassium fertilization at 100 kg potassium sulphate/faddan could be overcome the harmful effect of gamma irradiation in this respect on borage plant.

Respon Pertumbuhan dan Hasil Garut (Maranta Arundinacea) Terhadap Pembumbunan dan Pemupukan Kalium

<p>This research aims to determine the arrowroot responses on piling and potassium fertilizer application on its growth and yield. This research was conducted in Experiment Field of Agriculture Faculty SebelasMaret University at Sukosari, Jumantono, Karanganyar using Randomized Completed Block Design (RCBD) factorial with two factors of piling and potassium fertilization.There are 2 levels of piling, consists of without piling treatment (P0) and with in piling (P1).There are 3 levels of potassium fertilization consist of 250 kg ha-1 KCl, 300 kg ha-1 KCl, and 350 kg ha-1 KCl. Observation variable consist of plant height, leaf number, tiller number, biomass fresh weight per plant, biomass dry weight per plant, tuber numbers per plant, tuber weights per plant, tuber weights per plot, tuber diameter, and tuber length. Data were analyzed using analysis of variance and if there is significant difference, continue with DMRT (Duncan’s Multiple Range Test) of 5% level. The result showed that treatment with in piling (P1) can tends to increase yield of arrowroot plant on tuber numbers per plant, tuber weights per plant, and tuber weights per plot. Potassium fertilizer treatment with 350 kg ha-1 dose KCl tends to increase at growth and yield in all variables except the tiller numbers.</p>

EFFECT OF POTASSIUM FERTILIZER TO REDUCE THE EFFECTS OF DROUGHT TO GROWTH AND QUALITY OF THE RAPSEED

Field experimental was carried out in winter season 2015-2016 in experimental field_coll. Of Agri. university of Al. Anbar (Alternative sit Abu_ Ghraib) in the clay silt to study the effect of four level of potassium fertilizer (potassium sulphate K2SO4) that is (0, 80, 120 and 240 Kg.ha-1) with three period of Irrigation (10, 20 and 30 days) in the growth and holds rapseed in the study used in a split -plots arrangement in randomized complete block design (R.C.B.D) with three replicates it fertilizer levels of potassium main plots and served as irrigation periods secondary plots. Adding of potassium fertilizer at level of 240 Kg.ha-1 leading. The highest average recipes plant hight (177.9 cm), leaf area (1912 cm2), number of siliqua (204.8 siliqua.plant-1), number of seeds in siliqua (26.53 seed.Siliqua-1), overall winning (1785 Kg.h-1), oil percent (42.778%), potassium percent (0.7078%). Irrigation period recorded (10 days) the highest value of recipes such as plant hight (168.6 cm), number of siliqua (194.9 siliqua.plant-1), number of seeds in siliqua (24.87 seed.Siliqua-1), overall winning (1674 Kg.h-1), oil percent (41.950%), potassium percent (0.6617%), . while the period of (20 days) leading highest average recipes such as leaf area (1472cm2).