Late Sown Wheat Research Articles

Effect of Plant Growth Regulators On Water Relations, Proximate Composition, and Ascorbate/glutathione Cycle of Late-sown Wheat Under Saline Conditions

Effect of Plant Growth Regulators On Water Relations, Proximate Composition, and Ascorbate/glutathione Cycle of Late-sown Wheat Under Saline Conditions

Exogenous melatonin priming promotes seed germination by enhancing reserve mobilization and hormone metabolism of late sown wheat

Exogenous melatonin priming promotes seed germination by enhancing reserve mobilization and hormone metabolism of late sown wheat

Effect of enhanced doses of nitrogen and phosphorous on grain yield and its attributes in the late sown wheat (Triticum aestivum L.)

Effect of enhanced doses of nitrogen and phosphorous on grain yield and its attributes in the late sown wheat (Triticum aestivum L.)

Effect of integrated nutrient management on growth yield and economics of late sown wheat (Triticum aestivum L.)

Effect of integrated nutrient management on growth yield and economics of late sown wheat (Triticum aestivum L.)

Exogenous Applied Zinc, Cytokinin and Gibberellic Acid Affecting Growth and Yield of Timely and Late Sown Wheat (Triticum aestivum L.)

Exogenous Applied Zinc, Cytokinin and Gibberellic Acid Affecting Growth and Yield of Timely and Late Sown Wheat (Triticum aestivum L.)

Effect of split application of nitrogen at different growth stages on grain yield in late sown wheat (Triticum aestivum L.)

Effect of split application of nitrogen at different growth stages on grain yield in late sown wheat (Triticum aestivum L.)

Effect of various herbicides for weed control in late sown wheat (Triticum aestivum L.)

Effect of various herbicides for weed control in late sown wheat (Triticum aestivum L.)

The effect of pre and post-emergence herbicide application on the growth and yield of late-sown wheat (Triticum aestivum L.)

The effect of pre and post-emergence herbicide application on the growth and yield of late-sown wheat (Triticum aestivum L.)

Plant growth promoters boost the photosynthesis related mechanisms and secondary metabolism of late-sown wheat under contrasting saline regimes

There is an imminent risk of higher crop failures owing to weather vagaries for agriculture-based livelihood systems, which are already fragile due to several challenges. The most important challenge is the encounter of crops against multiple environmental stresses under natural field conditions, the combination of these stresses poses complex effects on plant physiological and metabolic activities. To date, the combined effects of salt stress (SS) and late-sown (LS) on physiological and biochemical attributes have not been studied on wheat. A two-year field study was designed to evaluate the effect of plant growth promoters (PGRPs) to alleviate the individual SS, LS and combinations on wheat. The experiment was conducted for three factors, a) late sown and timely sown, b) saline and non-saline conditions and c) PGRPs treatments (thiourea (TU @ 1000 mg L−1), salicylic acid (SA @ 100 mg L−1), hydrogen peroxide (H2O2 @ 100 µM), water spray (H2O) and control). Data revealed that under stress conditions, especially under SS+LS stress plants increased the synthesis of secondary metabolites, enhanced heat dissipation, and showed strict control over the stomatal regulation and gas exchange attributes, all these mechanisms were tweaked to deal with all the stresses. In addition, SS+LS stress followed by SS and LS stress severely reduced the flag leaf area (FLA), chlorophyll pigment contents and chlorophyll fluorescence and carboxylation capacity. However, foliar treatments of PGRPs TU, followed by SA, H2O2, H2O and control improved the chlorophyll fluorescence, pigments contents, gas exchange indicators, and relative water content (RWC). Moreover, PGRPs application improved the FLA, pigment biosynthesis and carboxylation capacity that improved the synthesis of metabolites such as anthocyanin, niacin, flavonoids, phenolics, alkaloids, saponin and riboflavin, which acted as defensive compounds to preserve the photosynthetic capacity irrespective of stress treatments.

Response of late-sown wheat (Triticum aestivum) to limited irrigation, seed rate and depth of sowing

A field experiment was conducted during the winter (rabi) season of 2014–15 and 2015–16 at New Delhi, to study the effect of limited irrigation, seed rate and depth of sowing on growth, yield, water-use parameters and economics of late-sown wheat (Triticum aestivum L.). The experiment comprised 3 factors, viz. 3 irrigation levels [(I1 , irrigation at crown-root initation (CRI) stage; I2 , irrigation at CRI stage + 0.2 irrigation water: cumulative pan evaporation (IW : CPE) ratio; and I3, irrigation at CRI stage + 0.4 IW : CPE ratio), 3 seed rates (S1, 75; S2, 100 and S2, 125 kg/ha) and 2 depths of sowings (D1, 5 cm and D2 , 10 cm). The field experiment comprising 18 treatment combinations, replicated thrice, was laid out in strip-plot design. Interactions between irrigation levels and seed rates, and irrigation levels and depths of sowing for grain yield were significant during 2014–15. Irrigation levels, seed rates and depths of sowing also significantly affected plant height, yield attributes, grain yield, straw yield and harvest index. Irrigation at CRI stage + 0.4 IW : CPE ratio resulted in significantly the highest plant height (86.3 cm), effective tillers/m2 (407.82), spike length (14.40 cm), spikelets/spike (17.43), grains/spike (44.20), grain weight/spike (2.05 g), 1,000-grain weight (48.95 g), grain yield (4.22 and 3.75 t/ha during 2014–15 and 2015–16) and harvest index (0.497 and 0.477 during respective season). Seed rate of 125 kg/ha resulted in significantly the highest plant height (82.7 cm), effective tillers/m2 (416.66), spike length (14.62 cm), spikelets/spike (17.53), grains/ spike (40.20), grain weight/spike (2.06 g), 1,000-grain weight (47.80 g), grain yield (3.63 t/ha during 2015–16) and harvest index (0.496 and 0.456 during respective year). Sowing depth of 10 cm resulted in significantly the highest plant height (82.2 cm), effective tillers/m2 (382.64), spike length (13.94 cm), spikelets/spike (16.44), grains/spike (38.21), grain weight/spike (1.90 g), 1,000-grain weight (46.24 g), grain yield (3.95 and 3.49 t/ha during both the years) and harvest index (0.456 and 0.443 during both the years).

Exogenous Application of Plant Growth Regulators Improves Economic Returns, Grain Yield and Quality Attributes of Late-Sown Wheat under Saline Conditions

Exogenous Application of Plant Growth Regulators Improves Economic Returns, Grain Yield and Quality Attributes of Late-Sown Wheat under Saline Conditions

Performance of Late Sown Wheat Varieties to Various Tillage Practices

The present investigation was conducted to the response of tillage practices on growth and yield of different wheat varieties under late sown condition in rabi season of 2019-20 at Research farm of College of Agriculture, Banda University of Agriculture and Technology, Banda. The experiment was laid out in Split plot Design with three replications. Tillage methods were taken in main plot (Zero tillage and conventional tillage) and five varieties (HI1863, HI 1544, Shriram bioseed 2001, Raj 4120 and K 1317) were taken in sub plots. Results revealed that adoption of zero tillage has recorded maximum emergence count, plant height, dry matter accumulation, tillers/m2, root length CGR, and RGR, as compared to conventional method of crop establishment. The 10.38 per cent grain yield advantage was recorded with zero till wheat as compared to conventional method. Similarly, 8.2 per cent advantage was recorded in straw yield of wheat as compared to conventional sown wheat. Similar to this, wheat variety K 1317 was produced maximum growth attributing characters along with higher yield and b: c ratio.

Optimizing planting density and nitrogen application to mitigate yield loss and improve grain quality of late-sown wheat under rice-wheat rotation

Late sowing is a critical factor that hinders achieving high-yield, good-quality wheat under rice-wheat rotation. Understanding the physiological basis and regulatory pathways that lead to late-sown wheat of high yield and good quality is crucial for developing effective cultivation strategies. A 2-year field experiment was conducted to investigate the effects of sowing date, nitrogen (N) application rate, and planting density on wheat yield, grain quality, population characteristics, and the underlying physiological factors. The results revealed significant interactions among the sowing date, planting density, and N application in regulating both yield and quality. Late sowing reduced grain yield primarily by reducing the number of spikes and kernels. However, the latter was improved by increasing N application and the planting density, thus mitigating the yield losses caused by late sowing. Moreover, the grain protein content (GPC) and wet gluten content (WGC) increased with delayed sowing dates and higher N rates, but decreased with increased planting densities. For wheat yields over 9,000 or 7,500 kg ha–1, the latest sowing date should not be later than Nov. 4 or 15, respectively. In addition, specific criteria should be met, including a maximum of 1.5 and 1.0 million stems and tillers ha–1, a maximum leaf area index of 6.7 and 5.5, and a dry matter accumulation (DMA) at anthesis of 14,000 and 12,000 kg ha–1, respectively. For high-yield, good-quality late-sown wheat, the optimal combination is a 25% increase in the N rate (300 kg N ha–1) and a planting density of 2.25 million (N300D225) or 3.75 million (N300D375) plants ha–1 for 10- or 20-day delays in sowing, respectively. These combinations result in higher leaf net photosynthetic rate; higher activities of leaf nitrate reductase, glutamine synthetase, and grain glutamic pyruvic transaminase; and a lower sugar-N ratio during post-anthesis.

Effect of Various Levels of Sulphur and Zinc on Growth and Yield of Late-Sown Wheat (Triticum aestivum L.)

The present study was conducted at the Crop Research Farm of the Institute of Agriculture Training and Research, Prem Nagar, Dehradun, Uttarakhand, India, during the 2022-23 year. The experimental design employed was a Factorial Randomized Block Design (RBD), comprising nine treatments each replicated three times. These treatments involved varying level of (Sulphur- 20kg, 25kg, 30kg/ha, Zinc- 20kg, 30kg, 40kg/ha) arranged in an RBD Factorial with plot size 2m×2m varying. The primary objective of this study was to assess the response of wheat crops to different levels of sulphur and zinc fertilization. The results indicated that both nutrients played crucial roles in enhancing late-sown wheat productivity and may offer valuable insights into sustainable crop management practices. Data analysis revealed that the most effective treatment for increasing the Quality characters and Yield is 30 kg Sulphur ha-1 + 40 kg Zinc ha-1 under agro-ecological conditions of Dehradun. This finding has the potential to guide farmers and agriculture practioners in optimizing crop yields and quality in similar environments.

Performance of Seed Rate on Wheat Crop (Triticum aestivum L.) under Late Sown Condition

A study was conducted to investigate the “Performance of seed rate on wheat crop (Triticum aestivum L.) Under late Sown Condition.” This experiment was carried out during the Rabi seasons of 2018-2019 and 2019-2 020 at the Pili-Kothi Student Research Farm and in the Laboratory Department of Agronomy at T.D.P.G. College Jaunpur. Increasing seed rates demonstrated a significant influence on various growth parameters, including initial plant population, shoot numbers, plant height, and dry matter production, with the highest values consistently observed at 140 kg/ha. In terms of yield-contributing characteristics, the 140 kg/ha seed rate led to increased spike counts, longer spikes, more grains per spike, and heavier grains. Yield significantly favored the 140 kg/ha rate, averaging 4.25-4.21 Mg/ha, surpassing the 120 kg/ha rate (4.08-4.07 Mg/ha) and markedly exceeding the 100 kg/ha rate (3.85-3.84 Mg/ha). The straw and biological yields further echoed this trend, cementing the prominence of the 140 kg/ha seed rate in augmenting late-sown wheat productivity.

Effect on Yield, Attribute Character and Economics of Various Treatment in Wheat (Triticum aestivum L.) Crop

A field experiment was conducted at Agronomy Research Farm of Narendra Deva University of Agriculture & Technology, Narendra Nagar (Kumarganj), Faizabad (U.P.) during Rabi season of 2014-15 to study the response of late sown wheat varieties to doses of nitrogen application. Eighteen treatment consisted of six doses of nitrogen (0, 40, 80, 120, 160 and 200 kg N ha-1) and three varieties of wheat (PBW-373, HD-2327, and NW-1014). The experiment was carried out in Randomized Block Design R.B.D. (factorial) with three replications on silt loam having low organic carbon (0.37%), nitrogen (194.25 kg ha-1), medium in phosphorus (15.25 kg ha-1) and potassium (250.25 kg ha-1). All the growth and yield parameters increased significantly with increasing nitrogen doses up to 200 kg ha-1. The maximum net return (Rs. 40712ha-1) was obtained at 160 kg N ha-1 with NW-1014 and B:C ratio 1.19 followed by same variety at 120 kg N ha-1. Thus it may be concluded that application of 160 kg N ha-1 proved appropriate levels of nitrogen for exploration of the yield potential of the late sown wheat varieties. Among the varieties NW-1014 was found the most suitable for cultivation under late sown condition for Northern East Plain zone.

Significance of yield sustainability to develop climate smart wheat (Triticum aestivum) in India

To ensure food security in India, not only the wheat (Triticum aestivum L.) productivity but yield sustainability is also crucial especially when the production environments are quite diverse. An experiment was conducted to examined multi-environment wheat yield trial data of popular wheat cultivars in two agro-climatically diverse regions i.e. north- western plains zone (NWPZ) and central zone (CZ) under timely-sown (TS) and late-sown (LS) conditions with an aim to differentiate yield and yield sustainability at the level of 4 production environment, 11 prominent locations and 7 crop years. Wheat productivity matched in both zones; yet the level of yield-sustainability was much less in warmer climate of CZ. Yield sustainability was poorest in late-sown wheat of CZ and the drop in sustainability index (SI) was realized in locations, years and genotypes. For grain yield; locations and location-year interaction mattered most in each production environments but the years were crucial only in NWPZ-TS. Results showed that yield sustainability of test sites can not be adjudged by its productivity alone. Location status was associated with the yield sustainability only in NWPZ. Substantial drop in sustainability could be noticed in some crop seasons of CZ but deviations in NWPZ were smaller. In test sites, the causative factors associated with yield-sustainability varied under different production environments. Genotype-year interaction was effective in each situation except CZ-LS where only the crop year variations were supreme. Variations in locations and genotypes mattered most in NWPZ-TS whereas the crop year deviations were impactful in NWPZ-LS and CZ-TS environments. Based on the results; prospect of improvisation and breeding strategy have been suggested to select suitable production sites and the genotypes.

Correlation of Germination, Seedling Vigour Indices and Enzyme Activities in Response to Liquid Organic Kunapajala to Predict Field Emergence in Late Sown Wheat

A laboratory experiment was conducted to correlate the germination test with seed vigour parameters and enzyme activities to predict seedling vigour and planting value on late sown wheat variety UP-2526. The experiment was conducted at GBPUA and T, Pantnagar during rabi season of 2020-2. The experiment consisted of five treatments viz; no priming (control), hydropriming, 10%, 25% and 50% kunapajala priming for 16 hrs. Results revealed that germination percentage was positively and significantly correlated with speed of germination (0.914*), seedling vigour index-II (0.890*), α-amylase activity at 12 and 16 hrs of priming (0.942* and 0.947*, respectively), seed reserve mobilization efficiency on 4th day (0.954*) after incubation and imbibition rate after 16 and 24 hrs of soaking duration (0.933* and 0.894*, respectively). Heat stress both low and high temperature are major reason of declining yield in wheat when sown delayed. Prediction of seedling vigour and field emergence of seed before sowing is prime important for assured yield in late sown condition.

Supplemental irrigation at the jointing stage of late sown winter wheat for increased production and water use efficiency

ContextThe sowing of winter wheat (Triticum aestivum L.) in the winter wheat-summer maize double cropping system is considerably delayed due to late harvest of the maize. This delayed sowing leads to reduction in spike numbers and ultimately the yield. Supplemental irrigation at the jointing stage (SIJ) can effectively regulate the population of winter wheat, but few studies have reported the impacts of SIJ on water utilization, wheat stem number fluctuations, and yield formation of late sown wheat. ObjectiveThe aim of this study was to determine the effects of sowing scheme accompanied with SIJ on wheat yield and water use efficiency (WUE). MethodsA two-year field experiment with two treatment factors (sowing date and irrigation schemes) in a split-plot design was laid out during 2018–2020 in the wheat growing seasons. The main plots were divided into two levels: normal sown date (A1) and late sown date (A2). The split plots included two irrigation schemes: no SIJ (W0) and SIJ (W1). ResultsThe soil water consumption at 20–120 cm soil depth during sowing to jointing stage in late sown wheat (A2) was significantly lower than the normal sown wheat (A1) but it increased considerably at 100–200 cm soil depth from jointing to maturity in A2. SIJ (W1) in late sown wheat produced better yield and WUE than no SIJ (W0). Under W1 conditions, A2 significantly promoted water consumption from jointing to maturity compared with A1, but, because water consumption from sowing to jointing was very low, seasonal water consumption remained significantly low. Additionally, A2 showed accelerated dry matter accumulation after jointing, increased grain numbers per spike and per unit area, improved net photosynthetic rate (Pn) of flag leaf and post-anthesis assimilate production. ConclusionsSIJ accelerated Pn and dry matter accumulation after jointing in late sown wheat, increased grain numbers per unit area, grain yield, and WUE without increasing seasonal water consumption. The seasonal water consumption in the normal sown period were higher. Although the number of spikes in normal sown wheat with higher water consumption, total stem number and dry matter accumulation before jointing was higher, after SIJ, the yield and WUE were lower than those of late sown wheat owing to the reduction in grain numbers per spike. SignificanceThis study explains how the sowing scheme and SIJ affect wheat yield and WUE, and demonstrates that SIJ was particularly crucial for late sown wheat to achieve the synergistic improvement of grain yield and WUE.

Influence of Seed Invigoration with Organic Kunapajala on Seed Quality and Biochemical Activity in Late Sown Wheat

A laboratory experiment was conducted at GBPUA&T, Pantnagar during rabi season of 2020-2021 to study the influence of seed invigoration with organic kunapajala on germination and biochemical activity in wheat variety UP-2526. The experiment was laid in completely randomized design which consisted of five treatments viz; no seed priming (control), Hydropriming for 16 hours, kunapajala seed priming @10%, 25% and 50% for 16 hours. Results revealed that germination percentage in hydro primed seeds and 25% kunapajala primed seeds jointly recorded maximum germination percentage (99.7%) which was statistically at par with 10% kunapajala priming (99.3%). Seed reserve mobilization efficiency after 4th day and 8th day of incubation was significantly affected by seed invigoration treatments. 25% kunapajala primed seeds recorded significantly higher dehydrogenase activity (0.68 OD) which was at par with hydroprimed seeds and 10% kunapajala primed seeds (0.63 and 0.62 OD, respectively). So, seed priming with either 10% or 25% organic kunapajala is an effective method to bring about improvement in germination of wheat and predict its field performance.