地面灌溉条件下中长绒陆地棉的水肥耦合效应

以中长绒陆地棉新陆中9号为材料，在新疆库车县进行了地面灌条件下水肥因素对新路中9号产量影响的田间试验。研究表明，在地面灌条件下水肥对中长绒棉都具有增产效果，单株结铃数与产量呈线性正相关，过多的水肥投入并不有利于棉花增产，合理肥料投入有利于发挥灌溉的增产作用。灌水量、施肥量与产量藕合关系的多元回归方程是为：Y=-1453.04+1.32703I+5.12236F-0.000211I2-0.005032F2-0.000263 I*F。新陆中9号获得最高产量1568kg/hm2时全生育期中合理施肥量和灌水量分别434kg/hm2（其中N 235kg/hm2、P2O5 143kg/hm2、K2O 56kg/hm2）和2879m3/hm2。

Effects of Water-fertilizer Coupling on Middle-long Staple upland cotton Yield Under Surface Irrigation

Under field production conditions, the experiment of effect of water-fertilizer coupling on cotton yield under surface irrigation conducted with the cotton variety, Xinluzhong 9 of South Region of Xinjiang as stuff. The results showed that water and fertilizer have the effect of increasing cotton yield under surface irrigation conducted, but when water and fertilizer supplies is excessive, the cotton yield will decrease. The relationship between cotton yield and number of boll per plant is linear in the conditions. Mathematical model for cotton yield and its main affecting factors water and fertilizer is established, which is Y=-1453.04 1.32703I 5.12236F-0.000211I2-0.005032F2-0.000263 I*F. The cotton yield per hectare will reach the top when W 2879 m3/hm2 and N 235kg/hm2, P2O5 143kg/hm2, K2O 56kg/hm2.