Abstract: According to the parameters obtained from experimental figures,a established to determine the raw cotton yield and cotton boll numbers per mathematical mu. Through the simulation and sieving,a comprehensive cultivating method had been taken to reach a high yield,top quality cotton,that includes growing density of 8340-8650 plants per mu, saving 6fruit branches, spraying 4.34-4.96g mepiguat chloride per mu, applying 8.03-9.OOkg nitrogen,2.68-3.Olkg pentoxide per mu. After analysing the model of yield,the sequence of effectiveness of four factors on raw cotton yield is:numbers of fruit branch> growing density> spraying mepiguat chloride>quantity of nitrogen and pentoxide applied. The shape of effectiveness diagram is a negative parabola. The complementary effectiveness is in significant. Through analysing the model of cotton boll mumbers per mu,a conclusion is reached; the effectiveness of cotton growing density and numbers of fruit branch on cotton boll numbers is negative parabola,however,that of spraying mepiguat chloride and quantity of nitrogen and phosphorus applied is positive parabola. In the meantime,analysis of cotton fibre quality confirmed that the influences of all four cultivating factors on cotton fibre quality are insignificant.

Key words: Interplanting summer cotton with wheat, Raw cotton yield, Fibre quality, Cotton boll numbers, Mathematical model

CLC Number: 

• S562