| 短季棉空心多茎株型施氮效应研究初报 |
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| 引用本文： | 柴卫东,刘永平,李洪芹,席国成,孙玉英,刘贞贞.短季棉空心多茎株型施氮效应研究初报[J].江西农业大学学报,2002,24(6):748-752. |
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| 作者姓名： | 柴卫东 刘永平 李洪芹 席国成 孙玉英 刘贞贞 |
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| 作者单位： | 河北省沧州市农林科学院,河北沧州,061001 |
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| 基金项目： | 国家“九五”科技攻关子专题 (96 - 0 0 4 - 0 1- 0 4 - 0 2 )，河北省“九五”科技攻关子专题 (96 2 2 0 915D - 0 2 ) |
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| 摘 要： | 空心多茎株是作者首创的短季棉高光效株型 ,它克服了短季棉的自身生理缺陷 ,显著提高了短季棉的产量和品质。本文探讨了施氮量对其产量和主要生育性状的影响。从实际产量看 ,75 .0kg·hm-2 纯氮即能显著提高空心多茎株型的皮棉产量 ,施氮利润也稳定较高 ,继续增施氮肥 ,皮棉产量不再有明显变化 ;从回归分析看 ,施氮量对皮棉产量的效应曲线符合开口向下的抛物线模型 ;从产量结构和干物质积累看 ,施氮主要是增加了单铃重和干物质积累量 ,其次是单株成铃 ,而对衣分和经济系数无明显影响 ;从单株功能叶片、叶片鲜干比叶铃比看 ,它们受施氮量影响最大 ,与干物质积累量和皮棉产量均呈显著正相关关系 ;从单株果节 (潜在库量 )看 ,它受施氮量影响中等 ,与干物质积累量和皮棉产量均呈不显著正相关关系。从总的看 ,强源是空心多茎株型施氮增产的主要原因 ,扩库对产量的作用是有限的 ;低氮量即能显著提高空心多茎株型的皮棉产量 ;继续增施氮肥 ,空心多茎株型只对氮素表现出较强的适应性 ,而没能充分发挥其产量潜力 ;产量潜力的发挥需要一整套栽培技术的支撑。
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| 关 键 词： | 短季棉 空心多茎株型 氮肥 效应 |
| 文章编号： | 1000-2286(2002)06-0748-05 |
| 修稿时间： | 2002年7月20日 |
A Study on Effect of Nitrogenous Fertilizer on Top-removed Short-dated Cotton |
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| CHAI Wei-dong,LIU Yong-ping,LI Hong-qin XI Guo-cheng,SUN Yu-ying,LIU Zhen-zhen.A Study on Effect of Nitrogenous Fertilizer on Top-removed Short-dated Cotton[J].Acta Agriculturae Universitis Jiangxiensis,2002,24(6):748-752. |
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| Authors: | CHAI Wei-dong LIU Yong-ping LI Hong-qin XI Guo-cheng SUN Yu-ying LIU Zhen-zhen |
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| Abstract: | Top removed plant type of short-dated cotton is a photosynthetic plant type. It is freed from the weakness of short-dated cotton, and is improved in its yield and quality. The effects of different nitrogenous fertilizer on its yield and main bearing characters are discussed in this article. According to the real yield, 75.0 kg/hm 2 of nitrogenous fertilizer increased the lint cotton yield obviously, and more nitrogenous fertilizer than that couldn't bring about change in its yield obviously. Regress analysis method was used in the experiments, which showed that the relation between nitrogenous fertilizer and lint cotton yield accorded with an upward parabola. The main function of nitrogenous fertilizer lay in the improvement of the weight of boll and hay substance; the second function lay in the number of bolls per plant. Nitrogenous fertilizer had no obvious effect on lint percent and economic coefficient. Nitrogenous fertilizer could obviously affect functional leafs, proportion of fresh-leaf-weight versus hay one, and proportion of leaf versus boll. It had remarkable positve correlativity with hay substance and lint cotton yield. The quantity of fruit nodes had no obvious change, and it had no remarkable positive correlativity with hay substance and lint cotton yield. On the whole, the buildup of fountain was the main cause of production increase while enlarged storeroom had a limited effect on production. A small amount of nitrogenous fertilizer could increase lint cotton yield remarkably. Although this plan type had adaptability to large amount of nitrogenous fertilizer, further increase of nitrogenous fertilizer could not increase its yield. The yield potential depends on a whole set of planting techniques. |
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| Keywords: | short-dated cotton top-removed plant type nitrogenous fertilizer effect |
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