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《Journal of Agricultural University of Hebei》 2001-04
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A preliminary study on photosynthetic performance during tuber expansion period of elephant-yam (Amorphophallus rivieri Durieu) grown in the north of China

LI Yan-ming, HU Yin-hua, LU Hong-zhan, ZHAO Yu-xin, ZHANG Jian-ping (College of Agronomy, Agricultural University of Hebei, Baoding 071001, China)  
A preliminary study on photosynthetic performance of elephant yam (Amorphophallus rivieri Durieu) was carried out under field conditions in the north of China (Baoding). During tuber expansion period (from early August to early September), photosynthetic rate (Pn) of elephant-yam showed great fluctuation owing to growing process and ecological conditions. The order of ecological factors according to their influences on photosynthetic rate were relative humidity (RH), air temperature (T), atmospheric CO 2 concentration () and photosynthetically active radiation (PAR), and of which, RH and were positively but T and PAR were negatively correlated to Pn. Cultivation techniques also had effects on Pn: The Pn were higher in plants grown from big seed tubers (101~150 g for each) than that from medium ones (70~100 g), higher in field-grown plants than in pot-grown ones, and higher in plants shaded by inter-cropping corn than in non-shaded ones. The diurnal changes of Pn were double peak curve, with a decrease at noon because of strong light and high temperature. The ecological conditions and cultivation techniques for improving photosynthesis of elephant-yam were discussed.
【Fund】: 河北省教委科学基金项目“魔芋引种及高产栽培技术”(冀教委 95 330 6 )部分内容
【CateGory Index】: S632.3
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