Effects of organic liquid fertilizer on canopy characteristics,yield and quality of cotton
[Objective]To ascertain the effects of organic liquid fertilizer on canopy characteristics,yield and quality of cotton under membrane drip irrigation in southern Xinjiang.[Methods]Tahe No.2 was selected as the test variety,and the cotton field with single fertilizer application was used as the control(CK).Organic liquid fertilizer treatment(carried out in the five fields of T1,T2,T3,T4 and T5)was set.The changes of plant height,main stem and leaf number,leaf area index,leaf dip angle,yield and quality under different treatments were measured and analyzed.[Results]Compared with CK,the application of organic liquid fertilizer in-creased plant height,leaf number,leaf area index,leaf inclination and aboveground biomass of cotton.When the seed cotton yield reached 6,000 kg/hm2,plant height,leaf number of main stem,leaf area index and leaf incli-nation angle increased by 1.3-10.3 cm,2.0-2.3,1.7-2.9 and 5.6-9.3° compared with CK,respective-ly.Compared with CK,the dry matter weight of nutrition and reproductive organs increased by 1.3-25.7 g/plant and 0.1-44.5 g/plant,respectively.When the seed cotton yield exceeded 6,000 kg/hm2,the seed cotton yield,single boll weight and total boll number increased by 17.2%-31.9%,15.5%-28.8%and 3.5%-10.1%compared with CK,respectively.In addition,compared with CK,the average length,uniformity and breaking strength of the top half of cotton were improved by applying organic liquid fertilizer.[Conclu-sion]Compared with single application of chemical fertilizer,the application of organic liquid fertilizer can im-prove cotton canopy structure,promote dry matter accumulation,increase yield and improve quality with low cost and easy operation,which is suitable for popularization and application in cotton area in southern Xinjiang.
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