| 段云佳,谭玲,张巨松,曹公利,阿丽艳.枣棉间作下氮素对棉花不同部位叶片生理特性的影响[J].干旱地区农业研究,2013,31(2):89~94 |
| 枣棉间作下氮素对棉花不同部位叶片生理特性的影响 |
| Effects of nitrogen levels of jujube-cotton intercropping system on physiological characteristics of cotton leaves in different positions |
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| DOI：10.7606/j.issn.1000-7601.2013.02.17 |
| 中文关键词: 棉花 间作 氮素 生理特征 |
| 英文关键词:cotton intercropping nitrogen physiological characteristics |
| 基金项目:国家科技支撑项目“南疆三地州高效现代特色农业关键技术研究与集成示范”（2009BADA4B01） |
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| 中文摘要: |
| 以南疆主栽品种中棉所49为材料，通过4个氮肥水平：纯氮0 kg·hm-2(N0)、207 kg·hm-2(N30)、310 kg·hm-2(N45)、414 kg·hm-2(N60)，研究棉花主茎功能叶和第五果枝铃对位叶生理特性的变化。研究结果表明: (1) 氮素缺乏会引起整体叶片的叶面积指数、SPAD值、硝酸还原酶活性、可溶性蛋白质和可溶性糖含量的下降，在主茎功能叶上表现尤为突出；(2) 氮素过多会导致盛铃后期叶片硝酸还原酶活性下降较快，可溶性蛋白质和可溶性糖积累过多，不利于向棉铃转化；(3) 枣棉间作近冠区棉花在N30处理、远冠区以N45处理中有较高单株结铃数和单铃重，从而提高产量，说明遮阴降低了棉花对氮肥的需求量。光照和氮素在植物生长中维持平衡、协调供应水平，利于发挥两者对
作物生长最佳的互作效应。因此将氮肥施用量控制在207～310 kg·hm-2范围内，能提高棉花碳氮代谢水平，延缓叶片衰老。 |
| 英文摘要: |
| This experiment was conducted in order to study the physiological characteristics of functional axial leaf and branch leaves as affected by applying different levels of nitrogen fertilizer: pure N 0 kg·hm-2(N0), 207 kg·hm-2(N30), 310 kg·hm-2(N45); 414 kg·hm-2(N60), using common cotton variety CCRI49. The Results were as follows: (1) Nitrogen deficiency lead to decrease of leaf area index, SPAD, leaf physiological index (NR, the content of soluble protein and soluble sugar), especially in functional axial leaves. (2) NR activity would fall fast at later full boll stage and the content of soluble protein, soluble sugar accumulated excessively when excess nitrogen fertilizer were used which was harmful. (3) The shaded cotton and the non-shaded cotton had higher yield under N30 treatment and N45 treatment, respectively. It showed that shading reduced the absorbition of Nitrogen. In this experiment, the nitrogen application rate among 207～310 kg·hm-2 could keep a blance carbon-nitrog
en metabolism level and prevent early senescence under light-nitrogen interaction system. |
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