Effects of different planting patterns and varieties on the production of photosynthetic substances in cotton and the impact of output
[Objective]To explore the effects of different planting modes and variety interactions on the production of photosynthetic substances and yield of cotton.[Methods]A field experiment was conducted in Hailou Town,Shaya County,Southern Xinjiang in 2022.Two machine harvesting planting modes were selected,namely"one film with three rows of 76 cm equal row spacing"and"one film with six rows(66+10)cm wide and narrow row spacing".Four cotton varieties with different plant types and structures,Yuanmian 11,Xin-luzhong 80,Xinluzhong 84,and J206-5,were extensively cultivated in Southern Xinjiang and the effects of different planting modes and variety interactions on cotton growth process,plant morphology,leaf area index,canopy opening,net photosynthetic rate,dry matter accumulation,and yield were analyzed.[Results]The growth period of one film with three rows was shortened by 3-7 days compared to one film with six rows,and the plant height and height of the initial fruit branch were greatly affected by the planting mode.In the early stage of cotton growth,one film with three rows was more conducive to cotton production and development com-pared to one film with six rows.The LAI and Pn of each variety showed that one film with three rows was grea-ter than one film with six rows.However,in the later stage of growth,different cotton varieties of different plant types performed differently.The loose type Yuanmian 11 and J206-5 maintain higher LAI and Pn under one film with three rows,while the compact plant types Xinluzhong 80 and Xinluzhong 84 performed better under one film with six rows.This in turn affected the formation of photosynthetic substances and yield.Yuanmian 11 and J206-5 increased their yield by 15.98%to 16.37%compared to one film and six rows,while Xinluzhong 80 and Xinluzhong 84 increased their yield by 9.23%-12.00%compared to one film and three rows.[Con-clusion]Different cotton varieties should choose suitable planting modes in order to further unleash their po-tential for yield increase.Cotton varieties with loose plant types are suitable for planting at a spacing of 76 cm,while cotton varieties with compact plant types are suitable for planting in the(66+10)cm mode.
cottonplanting patternsvarietygrowth and developmentyield
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