| 红壤旱地四种春夏作物水势比较研究 |
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| 引用本文： | 柳建国,何园球,陈长青,卞新民.红壤旱地四种春夏作物水势比较研究[J].土壤通报,2007,38(5):863-866. |
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| 作者姓名： | 柳建国 何园球 陈长青 卞新民 |
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| 作者单位： | 1. 南京农业大学,农学院,江苏,南京,210095
2. 中国科学院,土壤研究所,江苏,南京,210008 |
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| 基金项目： | 中国科学院知识创新工程项目;国家自然科学基金 |
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| 摘 要： | 大豆、花生、红薯、玉米是低丘红壤区主要的夏季旱地作物,研究表明:四种不同作物在相同或相似的环境条件下,作物水势时空分布的趋势一致;大豆(初花期)、玉米(大喇叭口期)、花生(开花结荚期)、红薯(块根膨大期)永久萎蔫时叶水势依次为:-2.3MPa、-2.10MPa、-1.75MPa、-1.30MPa,土壤水势分别为-1.159MPa、-0.818MPa、-1.534MPa、-1.644MPa。正常情况下,作物叶片水势大小及作物耐旱性顺序为:红薯>花生>大豆、玉米。小麦茬口玉米(抽穗期)和大豆(初花期)因叶片水势连续一周分别低于-2.2MPa和-2.3MPa被旱死。
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| 关 键 词： | 作物 水势 耐旱能力 |
| 文章编号： | 0564-3945(2007)05-0863-04 |
| 修稿时间： | 2006年7月9日 |
Comparisons of Water Potential among Four Kind Crops of Spring and Summer in the Upland Red Soil |
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| LIU Jian-guo,HE Yuan-qou,CHEN Chang-qing,BIAN Xin-min.Comparisons of Water Potential among Four Kind Crops of Spring and Summer in the Upland Red Soil[J].Chinese Journal of Soil Science,2007,38(5):863-866. |
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| Authors: | LIU Jian-guo HE Yuan-qou CHEN Chang-qing BIAN Xin-min |
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| Abstract: | Soybean,peanut,sweet potato,corn are main dry-land summer crops in the upland red soil. The results showsed that in the same or similar environmental conditions,the trend of distribution of four crops water potential were consistent on the spatial and temporal. The values of soil water potential were in turn -1.159MPa,-0.818MPa,-1.534MPa,-1.644MPa and leaf water potential were -2.3MPa,-2.10MPa,-1.75MPa,-1.30MPa in crops wilting point for soybean(early flowering),corn(bell-mouthed),peanut(florescence) and sweet potato(earthnut swell) . The order of the water potential of crop leaves and crop drought-resistant ability was usually sweet potato> peanuts >corn and soybean. Maize and soybean of wheat stubble-field were death in a week because of the leaves potential under -2.2MPa and -2.3MPa. |
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| Keywords: | Corps Water potential Drought resistance ability |
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