Abstract
An experiment has been carried out at field in Gardmalla/Qushtapa with reading GPS (longitude 440035E, Latitude 360023N) ,414 meter above sea level, 15.5 Km far Southern of Erbil city during the Winter season of 2017 to test the effect of application humic acid in soil and spraying boron on the growth and productivity of water on cauliflower. Factorial experiment 3 (humic acid) (0, 10 and 20 kg ha-1 using) × 4 (boron foliar) ( 0, 0.5, 1.0, and 2.0 kg B ha-1 ) using solid snow cultivars in RCBD with three replicates. Planting solid snow cultivars was done on 11/7/2017 (seeding date), 10 /8 /2017 (transfer to field) and 22/12/ 2017 picking or harvesting date. Irrigation water was applied at 35% depletion to the depth of total plant root and calculate the depth of water applied up to field capacity. Irrigation system is surface flow irrigation through line pipe provided with meter gages for measuring water applied. The results show that the application of boron and humic acid increase significantly all growth and yield parameters of cauliflower improved the highest values of leaf length (cm), leaf width (cm) and chlorophyll content (mg/cm2), recorded 47.67 cm, 28.45 cm and 40.66 mg/cm2; 75.39 cm, 37.55 cm and 43.11 mg/cm2 and 80.0 cm, 40.29 cm and 47.33 mg/cm2 in treatment 2 kg ha-1 of boron foliar and 0, 10 and 20 kg ha-1 of humic acid addition, respectively. The values of curd weight (kg), curd diameter (cm) and total yield (Mg/ha) values were 0.97 kg, 19.45 cm and 25.38 Mg/ha; 1.33 kg, 22.33 cm and 32.66 Mg/ha and 1.40 kg, 23.78 cm and 36.53 Mg/ha in treatment 2 kg ha-1 of boron foliar and 0, 10 and 20 kg ha-1 of humic acid application, respectively. Values of water productivity (Kg/m3) ranged between 6.25 to 12.18 Kg fresh (green) curd m-3 water applied.
Highlights
Micronutrients are defined as substances that are crucial for crop growth; they are used in lower amounts as compared the macronutrient, such as N, P and K [1],[2] have reported that foliar application of microelements improves the effectiveness of macronutrient
Because the available of nutrients in organic fertilizer this mean, to increasing the amount absorbed by plants and transferd to curd
Results of yield Cauliflower parameters and WUE (Table 3) indicate the importance of boron application for good yield and better utilization of water, this can be attributed to the role of micronutrients and humic acid fertilization in improving crop resistance to water stress and other stresses [15]
Summary
Micronutrients are defined as substances that are crucial for crop growth; they are used in lower amounts as compared the macronutrient, such as N, P and K [1],[2] have reported that foliar application of microelements improves the effectiveness of macronutrient. [9] study the effects of foliar applications of boron humate and calcium humate are investigated on yield, quality and biochemical content of cauliflower. Effects of boron humate and calcium humate applications on vitamin C, pH, total soluble solid dry matters, % dry matter, plant height, curd diameter, curd yield, number of leaves and mineral composition of plants were investigated. OM effect plant growth by increasing the improvement of photosynthesis system, micro and macro element uptake and changing in growth of root cells [11]. The effect of foliar application of boron on yield and yield components of cauliflower. 2. The effect of soil application of humic acid on quality parameters of cauliflower and water productivity. 3. The interaction of foliar application of boron and humic acid in yield of cauliflower and water productivity
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