旱地棉花高产稳产抗逆栽培技术研究

Research on Anti Reversibility Cultivation Technique of High and Stable Yielding Cotton in Rainfed Land

通过对播前不同底墒与棉花生育、生理及产量关系的研究，提出了旱地棉花应根据播前２ｍ土壤含水量决择当年棉花栽培体系。播前２ｍ土壤含水量平均在１３％以上，则采取覆盖争早体系；如果播前２ｍ含水量在１１％以下，则采取晚发栽培体系。同时研究了底墒与覆盖、品种、播期、密度。

The relationship among different base soil water and cotton yields,growth,development,and physiology prior to its sowing was studied.The results showed that the different cultivation technical systems should be adopted in accordance with soil water in the layer of 2 meters in depth before its sowing.When soil water in the layer of 2 meters in depth was averaged over 13% prior to its sowing,multching over the land was adopted early.When soil water in the layer of 2 meters in depth was below 11% prior to its sowing,late sowing was adopted.At the same time,the technical package of relationship among base water,multching,cotton varieties,sowing date and density as well as chemical control,etc.was studied.