| 不同土壤水分条件下施肥方式对甘薯叶片气体交换的调节作用 |
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| 引用本文： | 许育彬,陈越,齐向英.不同土壤水分条件下施肥方式对甘薯叶片气体交换的调节作用[J].干旱地区农业研究,2009,27(4):105-110. |
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| 作者姓名： | 许育彬 陈越 齐向英 |
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| 作者单位： | 1. 西北农林科技大学,陕西,杨凌,712100
2. 榆林市农业科研所,陕西,榆林,719000 |
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| 摘 要： | 采用盆栽试验,以甘薯品种秦薯4号和619为材料,研究了不同土壤水分条件下施肥方式对甘薯叶片气体交换的影响.结果表明,土壤水分和施肥方式对甘薯叶片净光合速率(Pn)、蒸腾速率(Tr)、水分利用效率(WUE)、气孔导度(Gs)、胞间CO2浓度(Ci)以及气孔限制值(Ls)有显著或极显著的影响,水肥之间存在明显的互作效应.与土壤湿润( 田间持水量70%～75%)相比,土壤轻旱(田间持水量40%～45%)对甘薯叶片Pn、Tr、WUE 、Gs、Ci以及Ls的影响较小,而重旱(田间持水量30%～35%)下,Pn、Tr、WUE、Gs和Gs 大幅下降,Ci明显上升.施肥有助于促进提高Pn、Tr、Gs以及Ls,降低Ci,而且氮磷配施的效果优于氮肥单施.Ci和Ls 的变化说明在土壤轻旱(40%～45%)条件下,甘薯叶片气体交换主要受气孔因素限制,而重旱(30%～35%)主要受非气孔因素限制.施肥通过改善气孔因素对甘薯叶片气体交换产生促进效应.
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| 关 键 词： | 甘薯 土壤水分 施肥方式 气体交换 调节作用 |
Regulating effect of fertilization form on gas exchange in leaves of sweet potato under different soil water conditions |
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| XU Yubin,CHEN Yue,QI Xiangying.Regulating effect of fertilization form on gas exchange in leaves of sweet potato under different soil water conditions[J].Agricultural Research in the Arid Areas,2009,27(4):105-110. |
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| Authors: | XU Yubin CHEN Yue QI Xiangying |
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| Institution: | XU Yu-bin1,CHEN Yue1,QI Xiang-ying2(1.Northwest A & F University,Yangling,Shaanxi 712100,China,2.Yulin Institute of Agriculture,Yulin,Shaanxi 719000,China) |
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| Abstract: | To understand the regulating effects of soil water and fertilization on gas exchange in sweet potato leaves under different conditions of soil water,with two cultivars of Qinshu 4 and 619 as materials,a pot experiment was conducted to measure and assay photosynthesis rate(Pn),water use efficiency(WUE),transpiration rate(Tr),stomatal conductance(Gs),intercellular CO2 concentration(Ci) and stomatal limitation value(Ls).The results showed that soil water and fertilization significantly influence Pn,Tr,WUE,Gs a... |
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| Keywords: | sweet potato soil water fertilization form gas exc hange regulation |
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