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中国农学通报

中国农学通报 ›› 2004, Vol. 20 ›› Issue (2): 232-232.

所属专题： 农业生态

• 目次 • 上一篇    下一篇

宁南黄土丘陵区旱地作物水分平衡特征与水分生态适应性研究

王龙昌, 王立祥 卞新民   

  • 出版日期:2004-04-05 发布日期:2004-04-05

Water equilibrium features and ecological adaptability of dry-land crops in the loess hilly areas of southern Ningxia

WANG Long-chang， WANG Li-xiang BIAN Xin-min   

  • Online:2004-04-05 Published:2004-04-05

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摘要： 依据田间试验结果，对宁南黄土丘陵区主要作物水分平衡特征与水分生态适应性进行定量评价。结果表明，夏熟作物全生育期水分满足率，干旱年份为55.9%~63.8%，丰水年份为84.1%~86.4%；秋熟作物全生育期水分满足率，干旱年份为67.7%~79.0%，丰水年份为92.1%~95.1%。水分生态适应性因作物类型和降水条件而存在差异，秋熟作物水分生态适应性指数高于夏熟作物，丰水年份的作物水分生态适应性指数高于干旱年份。旱地6种主要作物的水分生态适应性指数排序依次为：谷子＞马铃薯＞糜子＞胡麻＞豌豆＞春小麦。研究结果可为制定合理的旱区种植制度决策方案提供理论依据。

Abstract: Based on the experimental results, this paper analyzed the water equilibrium features and ecological adaptability of the dry-land crops in the loess hilly areas of south Ningxia. The results showed that the water satiety rate of whole growth period of summer crops was 55.9%~63.8% in the dry year and 84.1%~86.4% in the rainy year, and that of autumn crops was 67.7%~79.0% and 92.1%~95.1% respectively. The water ecological adaptability varied with the difference of crops and rainfall condition. The water ecological adaptability index (WEAI) of autumn crops was higher than that of summer crops, and the WEAI of crops in the rainy year was higher than that in the dry year. The WEAI of 6 main crops could be put in order as: millet＞potato＞panic＞flax＞pea＞spring wheat. The study results may provide theoretic basis for drawing up the decision scheme of cropping system in dry-land regions.