The Effects Of Water-Fertilizer Coupling On Island Cotton Under The Condition Of Irrigation

According to the problem of effects of water-fertilizer coupling on Island cotton under the condition of irrigation ,this plot trial was carried out in Fengshou Sanchang in Awati County, Xinjiang. Cotton breed, Xinhai 14, was planted: (1)The soil nitrogen content was negative correlation with soil water content and the edaphic layer, and the soil phosphor content expressed a perpendicular variation in soil profile under the different irrigation. (2)Under the different irrigation amount, salt and water content were not obvious correlation, but were linear correlation obviously with time and soil layer depths, that is to say, the salt distribution had big temp-spatial variation. (3) There was an equation about yield and irrigation amount, Y = 600.024+0.246 X-2.069E-05X2 (R2 = 0.957), Y-cotton yield,X-irrigation mount,unit-kg/hm2. According to the equation, when the irrigation amount was 5944.901m3/hm2 ,the output got to the highest,: 1331.246kg/hm2. (4) Under the same fertilizer usage, production efficiency of nitrogen fertilizer and phosphors fertilizer of the W4 were the highest. (5) Abscission Rate of Squares and Bolls of Long-stable Cotton was the smallest when irrigation water amount was W4. (6)Effect of nitrogen fertilizer on cotton yield was obviously, but phosphor fertilizer was not. And interaction between nitrogen and phosphate fertilizer are very prominence. (7) Under same irrigation condition, the N2P2 yield effect is the best. (8) Nitrogen fertilizer usage was negative correlation with soil water content, and the correlation was not obviously with soil salt content. Phosphate fertilizer usage was correlation with soil water content, and the correlation was not obviously with soil salt content.