Pedosphere 5(3): 259--266, 1995
ISSN 1002-0160/CN 32-1315/P
©1995 Soil Science Society of China
Published by Elsevier B.V. and Science Press
Crop yield response to water and fertilizer in loess tableland of China: a field research
LIU Wen-Zhao and LI Yu-Shan
State Key Laboratory of Soil Erusion and Dryland Farming on Loess Plateau, Northwest Institute of Soiland Water Conservation, Chinese Academy of Sciences, Yangling 712100 (China)
ABSTRACT
      This paper describes a field research on crop yield response to water and fertilizer in Changwu tableland of the Loess Plateau. Under the current level of land management in this area, low fertility of soil is the first yield-limiting factor and water deficit is the second. At a given fertility level, the relationship between crop yield and its water consumption is parabolic. Within a certain range of soil moisture, the soil water availability to crop is not sharply decreased with its markedly decreasing content. Because of this relatively high availability and the high reserve of soil water at the early stage of crop growth, drought due to inadequate or poorly distributed rainfall becomes less serious. High fertilizer input, improved crop variety and optimum cultivation technique can give a 50-100% yield increment of dryland crops in the loess tableland.
Key Words:  grain yield, Loess Plateau, soil fertility, soil moisture
Citation: Liu, W. Z. and Li, Y. S. 1995. Crop yield response to water and fertilizer in loess tableland of China: a field research. Pedosphere. 5(3): 259-266.
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