Effect of nitrogen,phosphorus and potassium application on yield and qualities of Xinhai 16 super sea cotton
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Effect of nitrogen,photassium and potassium application on grain Yield of Xinhai 16 super sea cotton were studied.Yield was increased obviously but fertilization was not apparent effect of its qualities.The results showed that Xinhai 16 yield of combined N 189.3 kg/hm~2,P_2O_5 134.4 kg/hm~2,K_2O 57.2 kg/hm~2 with Zn,Mn,B(micronutrition,) economic fertilization proportion was N∶P_2O_5∶K_2O=1∶0.71∶0.30.Yield of optimum fertilization increased by 40% than contrast treament,while the effect N,P and K application on Xinhai 16 qualities was not observed except for micron value.Cite
The effects of different nitrogen and phosphorus application on grain yield and qualities of compact corn Jidan 209 were studied.The results showed that a significant difference in grain yield of corn at different levels of nitrogen and phosphorus application was found.Under this experiment condition,the suitable application amount of N,P_2O_5 and K_2O was respectively 200 kg/hm~2,60 kg/hm~2 and(50 kg/hm~2),and the economical N application amount was 174.4 kg/hm~2.The effect of N application on corn grain protein content and lysine content was observed.When P amount was(30 kg/hm~2),to vary N amount from 100 kg/hm~2 to 250 kg/hm~2,corn grain protein content would increase by 0.33% and yield would increase by 10.1%.With the increase of N amount,corn gain oil content increased within certain level.With the increase of P amount,corn gain oil content increased in the same N level.
Corn oil
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A field experiment with the aim to study the effect of phosphorus (P) and potassium (K) combined fertilization on rapeseed (Brassica napus L.) growth, yield and nutrients accumulation was carried out during November 2001 to May 2002 at rapeseed produced area in southern-east Hubei province. The result showed that the combination of P and K significantly improved rape growth such as plant height, branches number, pods number, seeds number and seed weight increased with soil Olsen P 9.2mg/kg and available K 49.1mg/kg. Based on CK with N 180kg/hm2 and Borax 15kg/hm2, the treatment of P (P2O5 90kg/hm2) and K (K2O 120kg/hm2) combination (NPKB treatment) increased rapeseed yield by 4.71 folds, N accumulation by 3.45 folds, P accumulation by 9.64 folds, and K accumulation by 5.43 folds, respectively. On contrast, the yield of treatment NPB or NKB was limit and NKB treatment decreased the yield based on NB. It was demonstrated that there was positive interaction between P and K on rape growth and seed yield, which was +936kg/hm2.
Borax
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Effects of nitrogen application on the growth,yield and quality of peanut were studied in field experiments.The results showed that the yield of pods increased along with nitrogen amount increases when application amount was less than 120 kg/hm2.The highest yield was 3639.88 kg/hm2 and increased by 18.61% as compared with control when the amount of applied nitrogen was 120 kg/hm2.Under 0~150 kg/hm2 nitrogen fertilizer rate,applying nitrogen fertilizer could promote their absorption of N,P and K,regulate the transportation and distribution of nutrients in peanut plants,increase the protein content in the kernel.The highest protein content was 27.00% and increased by 6.77% when the amount of applied nitrogen was 120 kg/hm2.The absorption of N,P,K and the yield of peanut were decreased obviously when the amount of applied nitrogen was over 150 kg/hm2.
Nitrogen fertilizer
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The Effect of nitrogen,phosphorus and potassium amounts on yield of Yanjing218 were studied with comparative experiment.The results showed that nitrogenous fertilizer had the greatest effect on yield which growing rate were from-15.3% to 8.0%,the growing rate of phosphorus fertilizer and potassium fertilizer were from-2.9% to 1.7% and from-3.3% to 1.8%.The optimal contents about high efficiency of nitrogen,phosphorus and potassium amounts were 16～20 kg/667 m2、6.5～8.5 kg/667 m2、5.0～7.0 kg/667 m2 which counted by functional equation.Under the circumstances of the experiments the yield of Yanjing218 were 625.0 kg/667 m2.
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The experiment was carried out in field where available phosphorus level in 0~20 cm soil layer was 16.5 mg/kg.The results showed as follows: Treatment P_1(75 kg P_2O_5/hm~2) increased grain protein content and prolonged the dough development time and dough stability time and improved valorimenter value and the processing quality significantly,but treatment P_2(105 kg P_2O_5/hm~2) decreased the processing quality.Also the treatments of phosphorus applied promoted the accumulation of nitrogen in wheat and reduced the accumulation of NO_3~——N in 0~1 m layer soil,which reduced rapidly with the increasing of phosphorus rate applied.In addition,the yield increased with phosphorus applied,but the yield of both treatments of phosphorus applied had no significant difference.However the nitrogen efficiency decreased significantly with the amount of phosphorus applied increasing.
Winter wheat
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[Objective]Study of melon under mulch drip irrigation cultivation conditions on the growth and development of melon and on its yield and quality.[Method]Through field experiments,effects of different rates of potassium;0,75,150,225 kg/hm on melon growth and development,yield and quality were studied under drip irrigation cultivation conditions.[Result]The results showed that;(1) With increased potassium amount,the fast growth period of dry matter accumulation(△t) prolonged.It extended 1-6 days with the K fertilizer treatments than that without K fertilizer treatments.The potassium increased dry matter accumulation in the At period;potassium in the fast growth period to deal with a single plant accumulation increased the weight by 95.15 - 139.67 g;the total dry matter accumulation rate with treatments of K_0,K_1,K_2 and K_3 reach maximum level 63,66,65 and 64 d after sowing,respectively.(2) The rational application of potash fertilizer is conducive to the melon stem growth.The stem with K_2 processing in maturation period is re- spectively 3.49 and 3.17 mm higher than those with K_0 and K_3 processing.(3) Chlorophyll content and sugar content reach their maximum with the amount 150 kg/hm~2 of potassium.(4) Significant stimulation effect of potassium is found on the melon,and the yield reaches the maximum of 31 223 kg/hm with the amount of potassium in 150 kg/hm.[Conclusion]The optimum economic application rate of potassium is 116 kg/hm2 by the simulation of a quadratic equation.
Potash
Melon
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At the conditions of the field production, the experiment was conducted on calcareous cinnamon soil in the south part of Shanxi. Using the general quadratic rotatory regression of three factors and five levels, we studied the effects of combined K Zn Mn on yield and quality of winter wheat. The results were as follows: At one hand, under still dry weather, combined K Zn Mn increased deoxidized sugar content of wheat plant, reduced WSD of flag leaves, in the end, the yield of winter wheat was increased significantly; at the other hand, combined K Zn Mn improved the quality of winter wheat. Using yield 4 500 kg/hm 2, protein content 13% and wet gluten content 45% as optimum indexes, we found the most optimum application rate. The best result was KCl from 467.10 to 576.75 kg/hm 2, ZnSO 4·7H 2O from 90.45 to 108.45 kg/hm 2, and MnSO 4·H 2O from 72.3 to 103.8 kg/hm 2.
Winter wheat
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Abstract The aim of this study is to explore the optimal N, P and K fertilization model suitable for pear-jujube in the mountain of northern Shaanxi in 2016 years. This experiment use 3-factor, saturated optimal design for quadratic fertilization scheme. The effects of different fertilization treatments on the yield and quality of pear-jujube were studied through field experiments. And comprehensive evaluation based on the quality of pear-jujube. The results showed that N 1 P 3 K 3 has the highest yield, which is 48% higher than the control (CK). The effect of nitrogen, phosphorus, and potassium on yield is potassium fertilizer (positive effect)> phosphate fertilizer (positive effect)> nitrogen fertilizer (negative effect). Phosphate and potassium fertilizers have significant effects on increasing the content of soluble solids. Application of potassium fertilizer alone can significantly increase the content of reduced Vitamins c. The combined application of nitrogen, phosphorus, and potassium reduced the content of reduced Vitamins c. N 3 P 3 K 1 treatment can significantly increase the total sugar content in fruits. Single application of phosphate and potassium increases the content of organic acids in fruits. Other fertilization treatments have significant effects on reducing the content of organic acids in fruits. The sugar-acid ratio of N 3 P 3 K 1 is significantly higher than CK, which had an important effect on improving the taste. A high amount of potassium fertilizer has a significant effect on increasing the total flavonoid content in fruits. The interaction of nitrogen and phosphorus will reduce the total flavonoid content. The effect of nitrogen, phosphorus, and potassium on quality is potassium (positive effect)> nitrogen (positive effect)> phosphate (positive effect). Comprehensive analysis, the optimal fertilization amount when the target yield is 23000 ∼ 27000 kg·hm -2 and the quality score is above 85 is nitrogen (N) 406.93 ∼ 499.31 kg·hm -2 , phosphorus (P 2 O 5 ) 203.94 ∼ 297.08 kg·hm -2 , and potassium (K 2 O) 285.47 ∼ 322.82 kg·hm -2 .
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An optimized regression design with three factors and five levels was applied to study the effects of N, P and K fertilizers on the yield of Chinese Cabbage and its nitrate content in Guiyang. The optimum combination of the three fertilizers was shown to be in the range of N 180～200kg/hm 2+P 2O 5120～150kg/hm 2+K 2O120～150 kg/hm 2 , which gave high yields of the crop with low contents of nitrate.
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The different levels of phosphorus and potassium nutrition on the productivity of two-rowed winter barley (Hordeum vulgare L.) cv. Kamenitza were studied under conditions of pot experiments. Two greenhouse pot experiments with increased nitrogen, phosphorus, and potassium fertilizing levels were conducted. The effect of potassium fertilization and different levels of nitrogen fertilizing was studied at the first experiment. The investigated nitrogen levels were 0, 200, 400 and 600 mg N/kg soil and the levels of potassium fertilizing were 0, 200, 400 mg K2O/kg soil. The aim of the second pot experiment was to establish the effect of increasing levels of phosphorus fertilizing at a background of 400 mg N and 200 mg K2O per kg soil on the barley grain and protein yields. The plants were grown in plastic pots (5L volume). Each pot was contained 5 kg soil (Molic fluvisol) with pH (H2O) - 7.3, humus content 3.2%, Nmin - 39.8 mg N/kg, available phosphorus (method of Egner - Riehm) - 102 mg P2O5/kg, and available potassium (2 N HCL) - 460 mg K2O/kg. The different levels of mineral nutrition at two pot experiments were created by applying of NH4NO3, Ca(H2PO4)2.H2O, and K2SO4 in the form of water solutions. Thirty seeds were sown in each pot ant the plants were reduced to equal number in each pot (15) at tillering. Phosphorus and potassium fertilizing were a proved positive effect on the nutrient regime of barley plants, productivity and grain quality. Moderate phosphorus fertilizing 200 mg P2O5.kg -1 soil combined with levels N 400K200 showed the highest grain and protein yields and grain protein concentrations. Grain protein concentration increased from 12.5 to 13.5% and protein yield increased by 28.6%, compared to variant without phosphorus N400P0K200. The K levels of 200 and 400 mg K2O.kg -1 soil increased the grain yield when were combined with nitrogen levels of 200 - 400 N mg/kg soil. The changes of potassium nutrient regime by fertilizing alone in a range K0 - K400 on the background of N0P200, slightly affect the grain protein concentrations and yields of barley. The potassium fertilization demonstrated a positive effect on the concentrations of plant nitrogen at tillering. The concentrations of N and P of barley plants at tillering stage slightly depended on fertilizing levels P0-P400.
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