抗虫杂交棉豫杂35适宜密度与行距配置研究

Studies on Suitable Densities and Configurations of Insect-resistant Bt Transgenic Hybrid Cotton Yuza 35

在河南省高产栽培条件下，研究了抗虫杂交棉豫杂35的适宜密度和行距配置。结果表明，在保留2～3个强势叶枝时，豫杂35以种植2．25万株／hm^2配合行距1．20m较为适宜，分别比1．50万株／hm^2配合行距1.20m、2．25万株／hm^2配合行距1.00m，1.50万株／hm^2配合行距1.00m、3．00万株／hm^2配合行距1.20m、3．00万株／hm^2配合行距1．00m的处理增产皮棉3．31％，4．42％，5．41％，8．63％，16．38％。增产的主要原因是棉花叶面积系数（LAI）适中，冠层光分布合理，干物质分配到生殖器官的比例较大，单位面积的总成铃数较高。

Suitable densities and configurations of insect-resistant Bt transgenic hybrid cotton Yuza 35 was studied under high yield cultivation conditions in Henan province. Results showed that,in the cases of 2-3 predominant monopodium per plant was retained, population of 2.25 × 10^4 plant per ha with 1.20 m-wide rows was suitable for Yuza 35 and 3.31% ,4.42% ,5. 41% ,8.63% ,16.38% more lint yield was harvested comparing with 1.50 ×10^4 plant per ha with 1.20m-wide rows,2. 25 × 10^4 plant per ha with 1.00 m-wide rows,1.50×10^4 plant per ha with 1.00m-wide rows,3.00 × 10^4 plant per ha with 1.20 m-wide rows, 3.00 × 10^4 plant per ha with 1.00 m-wide rows respectively. Cotton population of 2.25 × 10^4 plant per ha with 1.20m-wide rows also showed appropriate LAI and light distribution in canopy, more dry matter distributed to reproductive organs and more bolls retained.