| 甘蔗品种伸长期光合特性及冠层光合量的估算 |
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| 引用本文： | 吕建林,张木清,陈如凯,高三基,徐良年,方辉.甘蔗品种伸长期光合特性及冠层光合量的估算[J].亚热带农业研究,1998(1). |
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| 作者姓名： | 吕建林 张木清 陈如凯 高三基 徐良年 方辉 |
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| 作者单位： | 福建农业大学甘蔗综合研究所 |
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| 摘 要： | 本文在活体测量的基础上，分析了７个甘蔗示范品种和对照种闽糖７０－６１１在不同光合有效辐射（ＰＡＲ）下＋１叶的净光合速率（Ｐｎ）、光呼吸强度（ε）、水分利用效率（ＷＵＥ）的变化情况，并对冠层总的同化量进行估算。结果表明：甘蔗不同品种＋１叶的Ｐｎ随ＰＡＲ变化较大，但冠层总的同化量与单叶的Ｐｎ没有明显的相关性，各品种的光呼吸强度不大，变化在２．２×１０－２－２．５×１０－２μｍｍｏｌ·ｍ－２·ｓ－１之间；ＷＵＥ除福农８９－２０９、福蔗８７－１０与对照品种相当外，其余均比对照种高，且这种差异与Ｐｎ无正相关性。
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| 关 键 词： | 甘蔗 光合特性 冠层光合量 水分利用率 |
The Photosynthetic Characteristics and Estimation of Canopy Photo- sythetic Yield of Different Sugarcane Varieties at the Elongation Stage |
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| Abstract: | Based on intact observation, seven sugarcane varieties and one control variety-MT70-611 were used to analyze the differences of net photosynthetic rate(Pn), photoerspiration rate(e), water use efficiency(WUE) of the +1 leaf under various photosynthetic available radiations (PAR). Meanwhile their canopy photosynthetic yields were estimated. The results indicated that the +1 leaf Pn of different varieties varied remarkably with PAR, but their canopy photosynthetic yields were not related to single-leaf Pn, their photorespiration rates changed from 2.2×10-2to 2.5×10-2μmmol·m-2·s-1,their WUEs were higher than the control except FN89-209, FZ87-10 and the difference of was not positively correlated to the +1 leaf Pn. |
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| Keywords: | sugarcane photosynthetic chatacteristics canopy photosynthetic yield water use efficiency |
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