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VARIATION CHARACTERISTICS OF FIELD WATER CONSUMPTION AND SOIL WATER DEFICIT FOR SOME CROPS GROWING ON THE RAINFED LOESS PLATEAU OF EASTERN GANSU(PDF)

Chinese Journal of Applied & Environmental Biology[ISSN:1006-687X/CN:51-1482/Q]

Issue:
1996 03
Page:
259-267
Research Field:
Publishing date:

Info

Title:
VARIATION CHARACTERISTICS OF FIELD WATER CONSUMPTION AND SOIL WATER DEFICIT FOR SOME CROPS GROWING ON THE RAINFED LOESS PLATEAU OF EASTERN GANSU
Author(s):
Li Fengrui Gao Chongyue
1. State Key Laboratory of Arid Agroecology, Lanzhou University, Lanzhou 730000;
2. Gansu Grassland Ecological Research Institute, Lanzhou 730020
Keywords:
year type of precipitationfield water consumptionsoil water storagesoil water deficitcompensative effect
CLC:
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PACS:
DOI:
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DocumentCode:

Abstract:
The law of field water consumption, variation characteristics of soil water utilization degree and soil water deficit.as well as the relationship among crop production, water use efficiency and field water consumption by some crops were examined based on the observations of soil water in a 3 a field experiment on crop rotation systems conducted on the rainfed Loess Plateau of Eastern Gansu during the years between 1988~1991.Field water consumption, soil water utilizating degree and soil water deficit varied in different year types of precipitation for four crops,and also differed among different crops in the same year.Irrespective of dry year or wet year,field water consumption of the autumn-sown winter wheat appeared to be more dependent upon soil water storage than the spring-sown corn, potato and pearl millet.Besides,the autumn-sown crop experienced a severer soil water deficit within its phenostages than the spring-sown crop.This occurred because there were obvious differences in sowing time,phenological stages and water consumption features for the spring-sown crop and autumn-sown crop.

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Memo

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Last Update: 1900-01-01