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Position: Home > Articles > FLUCTUATION OF YIELD ON HIGH-YIELD FIELD AND DESICCATION OF THE SOIL ON DRYLAND Acta Pedologica Sinica 2001,38 (3) 353-356

旱作高产田产量波动性和土壤干燥化

作  者:
李玉山
单  位:
中国科学院水利部水土保持研究所
关键词:
旱地作物;产量波动性;干燥过程;高产田
摘  要:
根据旱地作物长期田间试验数据 ,论述了旱作农业生产中作物产量波动性是一个规律性现象 ,并用波动系数加以表述。研究结果表明旱作高产田与低产田相比 ,存在相似的产量波动性 ,区别是它在较高产量水平上波动。高产田作物耗水量较高 ,从而导致土壤相对干燥化。土壤干燥化是高产田产量产生波动性的直接原因 ;而低产田则因作物吸水能力低 ,土壤储水不能充分利用所致
译  名:
FLUCTUATION OF YIELD ON HIGH-YIELD FIELD AND DESICCATION OF THE SOIL ON DRYLAND
作  者:
Li Yu-shan (Institute of Soil and Water Conservation Chinese Acadmy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100)
关键词:
Desiccation, Dryland crops, High-yield field, Yield fluctuation
摘  要:
Based on the data of a long term field experiment of dryland crops, t his art icle points out that yield fluctuation, expressed in fluctuating coefficient, is a regular phenomenon in dryland farming. High-yield field has a similar fluctua tion as compared with low-yield field but their mechanisms are different. Desicc ation happened in the entire soil profile is a direct cause of the yield fluctuation f or high-yield field, but low water absorbing capacity of the crop for low-yieldi ng field.

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