不同生育时期持续受渍对棉铃空间分布的影响

Influence of Surface and Subsurface Waterlogging Stress on Spatial Distribution of Bolls during Different Growth Periods in Upland Cotton

通过测坑试验,研究了在蕾期、花铃期和吐絮期分别持续受渍7d对陆地棉(GossypiumhirsutumL.)植株成铃空间分布的影响。结果表明,持续受渍导致棉株各部位成铃率降低,蕾期持续受渍主要影响下部果枝内围部位成铃,花铃期持续受渍主要影响中上部中外围部位成铃,吐絮期持续受渍主要影响上部、顶部中外围成铃;持续受渍对棉花成铃影响最大的时期是花铃期,其次是蕾期和吐絮期。棉株具有较强的自身补偿能力,采取适当的田间管理措施可提高棉花成铃和抗涝渍能力。

Influence of 7 d surface and subsurface waterlogging stress on spatial distribution of cotton bolls was studied by test-pit experiments during seedling period, flowering and boll setting stage and period of boll opening, respectively. Results indicated that surface and subsurface waterlogging stress decreased boll rate; waterlogged stress during seedling period mainly effected cotton boll forming at lower and inner positions of the plants; waterlogged stress at flowering and boll setting stage generally influenced boll forming at middle-upper and middle-outer location, and waterlogged stress during period of boll opening impacted on boll forming mostly at top and middle-outer positions. Flowering and boll setting stage was the period when cotton boll forming was more intensively influenced by waterlogged stress than that during seedling period and boll opening period. Cotton plant had strong self-compensation ability, which could be applied to improve the capability of boll forming and waterlogging-resistence after waterlogged stress through applying some suitable field management.