| 罗新宁,陈冰,张巨松,蒋平安.南疆地区不同施氮量棉花叶片光合特性及产量表现[J].干旱地区农业研究,2011,29(2):40~44 |
| 南疆地区不同施氮量棉花叶片光合特性及产量表现 |
| Photosynthetic characteristics and yield of cotton under different nitrogen application rate in Southen Xinjiang |
| |
| DOI：10.7606/j.issn.1000-7601.2011.02.07 |
| 中文关键词: 棉花 施氮量 光合特性 产量 |
| 英文关键词:cotton nitrogen application rate photosynthetic characteristic yield |
| 基金项目:国家“十一五”科技支撑计划项目棉花高产优质高效栽培技术研究(2006BAD21B02-1)；新疆“十一五”重大专项(200731133-1)；新疆维吾尔自治区土壤学重点学科基金项目 |
|
| 摘要点击次数: 473 |
| 全文下载次数: 313 |
| 中文摘要: |
| 在南疆生态条件下通过不同氮素水平(0、207、258.75、310.5、362.25 kg/hm2)的大田试验,研究了氮素对棉花叶片光合特性和产量的影响。结果表明,追施氮肥可以提高棉株叶片叶绿素含量,改善叶片光合性能、增加叶面积,提高中下部叶片光合速率,提高光合产物的生产能力,延缓叶片衰老。施氮过多,棉株后期营养生长过旺,田间郁蔽,通风透光不良,影响光合作用。当施氮量在0258.75 kg/hm2范围内,棉花产量随着施氮量增加而增加,施氮量超过258.75 kg/hm2,产量呈下降趋势。 |
| 英文摘要: |
| Based on an nitrogen experiment under ecological condition in Southen Xinjiang，the effect of nitrogen
fertilizer on photosynthentic characteristics and yield of cotton were investigated . The result showed that topdressing nitrogen rate could improve photosynthetic characteristics and the chlorophyll content of cotton，delay senescence of leaves and
raise net photosynt hesis rate; cotton leaves area and LAI were enhanced with reasonable N application, and LAI decreased
rapidly in later stages with excessive N rate. Shedding rate of cotton stem leaf declined when N rate was 258.75 kg/ hm2.
Cotton yield increased when N rate applied was among 0~258. 75 kg/hm2，and decreased until N rate applied exceed 258.75 kg/ hm2. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| | |