Study on suitable planting density of cotton with different row spacing configurations in southern Xinjiang
[Objective]To explore the suitable planting density of cotton with different row spacing con-figurations in the hope of providing a theoretical basis for the rational planting method and suitable density of machine cotton picking in southern Xinjiang.[Methods]Through field experimental research,the split-plot experimental design was adopted,and four row spacing configurations were set in the main area,namely 3 rows of H3:1 membrane(76 cm equal row spacing),4 rows of H4:1 membrane(66+10+66)cm,5 rows of H5:1 membrane(10+66+66+10)cm,6 rows of H6:1 membrane(10+66+10+66+10)cm,and 3 planting densities were set in the secondary area,respectively,A1:150,000 plants/hm2;A2:187,500 plants/hm2;A3:225,000 plants/hm2,the agronomic traits,leaf area,dry matter quality and seed cotton yield of cotton were determined in order to obtain the optimal planting density of cotton under different row spacing configurations.[Results]The experimental results showed that the plant heights of cotton with differ-ent row spacing increased with the increase of density after topping,and the plant heights of A3 treatment were significantly higher than those of A1 treatment.After topping,the thickness of cotton stems became smaller with the increase of density,and the thickness of the stems treated with A1 was significantly higher than that of A3.The maximum LAI of cotton increased with the increase of density under H3 and H4 conditions,while it was the maximum at A2 density under H5 and H6 conditions.The maximum dry matter accumulation per unit area of cotton with different row spacing was the largest in A2 treatment.The density significantly affected the yield of seed cotton and the number of bolls per unit area,and the row spacing significantly affected the weight of the single boll.The highest seed cotton yield obtained by H5 A2 was 7,026.9 kg/hm2,which was 0.8%-14.5%higher than that of other treatments.[Conclusion]Under the conditions of this study,the optimal planting density of 1 membrane with 3 rows(H3),1 membrane with 4 rows(H4)and 1 membrane with 6 row(H6)spacing was 225,000 plants/hm2,and the suitable planting density of 1 membrane with 5 rows(H5)was 187,500 plants/hm2.
cottonrow spacingdensityyield
刘超群、董合林、万素梅、郑苍松、骆磊、马云珍、董祯林、陈国栋、李鹏程
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塔里木大学农学院,新疆阿拉尔 843300
中国农业科学院棉花研究所/棉花生物育种与综合利用全国重点实验室,河南安阳 455000
中国农业科学院西部农业研究中心,新疆昌吉 831100
棉花 行距 密度 产量
"丝路同源 智慧闽昌"棉花减肥增效李鹏程团队项目棉花产业技术体系岗位科学家中国农业科学院科技创新工程(CAAS-ASTIP-CCRI)棉花生物学国家重点实验室开放课题塔里木大学校长基金团队项目Science and technology innovation project of Chinese academy of agricultural sciences(CAAS-ASTIP-CCRI)
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