Effects Of Water And Nitrogen Fertilization On Growth And Development,water And Nitrogen Use Efficiency Of Drip No-till Cropping Oil Sunflower

Object:The field experiment was conducted to study the effects of the interaction of the water and nitrogen fertilization on the growth,physiological characteristics,yield,water use efficiency and nitrogen use efficiency of cropping oil sunflower,to get the better N fertilization and water combination of drip no-till cropping oil sunflower,to provide a theoretical basics for high yield and efficient production of cropping oil sunflower.Methods:The field experiment with split-plot in the agriculture experiment station of Shihezi University at 2014,The study sets the variety of xinkui10 as test materials,this experiment set three irrigation rate treatments and four nitrogen treatments, The field experiment was conducted to study the growth and development,physiological characteristics(proline,NRA,the root activity),water use efficiency,N use efficiency, the grain yield and the yield components.Results:1. In different water and nitrogen interaction treatment,the plant height and the leaf area index increased as the irrigation increased,the difference of W3,W2 and W1 was significant,and there was no significant difference between W3 and W2;In the same water treatment,the plant height and the leaf area index follows:N3>N2>N1>N0,under low water treatment,there was no significant difference between every nitrogen treatment.In suitable water and high water treatment,the difference of N3,N2 and N1,N0 were significant,there was no significant difference between N3 and N2.2. The above ground dry matter accumulation of sunflower increased as the irrigation and nitrogen increased, the differences of W2N2 and W2N3,W3N2 and W3N3 were not significant,the dry matter accumulation of pre anthesis increased as the irrigation and nitrogen increased,in the mature stage,W2 and W1 compared to W3,the dry matter distribution ratio in leaves were deceased by14.4% and 18.1%, the dry matter accumulation of disk increased by 7.7% and 12.3%, W2N3 was highest,reaching 58.9%, so the suitable water and high nitrogen(W2N3) could reduce the dry matter distribution rate in vegetative organs,promote the dry matter to grain distribution,and improve the grain yield.3. With the increase of irrigation amount,the proline content was decreased,the proline content increased as irrigation amount in low water treatment(W1),in the suitable water(W2) and the high water(W3)treatment,there was no significant difference between every nitrogen treatment of proline content;The water use efficiency performances:W2>W1>W3,in the low water treatment(W1) and suitable water treatment(W2) treatment,the water use efficiency increased as nitrogen,there was no significant difference between W2N2 and W2N3, in the high water treatment(W3),the water use efficiency increased first and then decreased as the nitrogen.4.The nitrate reductase activity had performance:W3>W2>W1,and the nitrate reductase activity increased as the nitrogen amount, there was no significant difference between N2 treatment and N3treatment;The Agronomic nitrogen use efficiency,Physiological nitrogen use efficiency, nitrogen production efficiency,and nitrogen use efficiency had same performance:W2>W3>W1,and increased first and the decreased as5.the nitrogen amount, the comprehensive performance of W2N2 was the highest.5.In the suitable water treatment(3750m3·hm-2) under the condition of nitrogen is 120kg/hm2,the grain yield of oil sunflower was more higher, the water use efficiency was the highest,with the increase of the nitrogen,the grain yield was not increased,and it is easy to cause the waste of nitrogen fertilizer.