| 胡明芳,田长彦,马英杰,王林霞,吕昭智,卞生珍.氮素营养对棉铃形成与脱落的影响[J].干旱地区农业研究,2005,(1):95~98 |
| 氮素营养对棉铃形成与脱落的影响 |
| Effects of nitrogen on the formation and shedding of cotton bolls |
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| DOI：10.7606/j.issn.1000-7601.2005.01.18 |
| 中文关键词: 氮 棉花 有效铃 脱落率 |
| 英文关键词:nitrogen cotton available cotton bolls shedding rate |
| 基金项目:中国科学院创新项目(KZCX1-08-01)； 中国科学院农业项目(NB十五-E02) |
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| 中文摘要: |
| 通过田间小区试验,对不同氮肥用量下棉株的棉铃数量与分布及其随生育进程的变化进行了研究。结果表明:有效棉铃数量与氮肥施用量密切相关,蕾铃脱落率与氮肥施用量呈显著负相关,充足的氮素营养是增加有效铃数和降低脱落率的必要条件;施用氮肥延长棉铃增长的时间,并相对滞后脱落率上升的趋势;施用氮肥增加了棉株各个部位的有效铃数,尤其提高了中下部果枝上有效铃所占比重,同时施用氮肥降低了中下部果枝上的蕾铃脱落率。 |
| 英文摘要: |
| The relationship of amount and distribution of cotton bolls with N rates during growth period was studied through field experiments. The main results were as follows: number of available cotton bolls were strongly correlated with N rates, and shedding rates of buds and bolls were negatively correlated with N rates; abundant nitrogen nutrition were the necessary condition to increase available bolls and decrease shedding rate; applying nitrogen fertilizer prolonged the duration of cotton bolling increase and delayed the increasing trend of shedding rates; applying nitrogen fertilizer increased number of available bolls on different fruit branches, especially enhancing the proportion of cotton bolls on the middle and lower branches, and reducing shedding rates of bolls on the middle and lower branches. |
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