Construction Of The Multiple Cropping Pattern With The Function Of Resisting The Hail Disaster In The Cotton Field And Management Measure Analysis After Hailstorm

In the thesis,close observed and analyzed the growth development express of each main stage and the yield,adopting the multiple cropping pattern of the winter wheat || spinach / cotton —Soy bean (or watermelon )in the cotton experiment field of Akasu cotton district where is frequently encounter hailstorm． And analyzed synthetically the developments of 7 main physiological indexes of 5 cotton breeds(Series )(7013,35-31,Zhongmiansuo 35th,Xinluzao 10and KB-85 )in order to reseach the recovery capability and the yield compensation latent capacity of the cotton after the disaster caused by hail．In addition ,the thesis still compared the economy benefit ,the ecology benefit and the community benefit of the multiple cropping pattern to the locality several main cropping patterns in the cotton filed ,applying mathematics analysis method of the Grey Separates Much．Results have been made known :(1)The composite field climate more fit for increasing production of every crop(especially the winter wheat)in the multiple cropping pattern than the simple field climate．(2)The multiple cropping pattern is better,and have very powerful service capacity to reduce the damages of the natural disasters caused by hail．It is the optimum cropping pattern that be applied for the cotton district where the disasters caused by hail．(3)The cotton growth development situations and the yields,which had suffered by the hailstorm,under the influence of the resistance of the different cotton breeds ,the hailstorm danger degree and the effectual measures．(4)The Xinluzao 10 ,KB-85 and Zhongmiansuo 35th ,recovering their growth capability and the capability of survive oneself is more powerful ,would be grown in the cotton district where the disasters caused frequently by hail．(5)Present the key remedy measures and management．The above researches about the multiple cropping pattern in the cotton fields have the far-reaching sense,supplying the scientific foundation for the food secure problems of Xinjiang ,the remedy measures for the disaster caused by hail in the cotton field ,the plantation composition regulation,and even the further development that all of Xinjiang cotton．...