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[1]LIU Xiao-fang,ZHANG Sui-qi,ZHOU Xiao-ping,et al.Response of Profile Distribution of Maize Root System to Water Stress[J].Research of Soil and Water Conservation,2009,16(02):181-185.

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Response of Profile Distribution of Maize Root System to Water Stress

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 16 Number of periods: 2009 02 Page number: 181-185 Column: Public date: 2009-04-20

Title:: Response of Profile Distribution of Maize Root System to Water Stress

Author(s):: LIU Xiao-fang^1,2,3, ZHANG Sui-qi^1,2, ZHOU Xiao-ping^1,3, MU Zi-xing¹, LIU Li-sheng¹; 1. State Key Laboratory of Soil Erosion and Dryland Farming of the Loess Plateau, Institute of Soil and Water Conservation, Northwest A & F University, Yangling, Shanxi, 712100, China;
2. Research Center of Soil and Water Conservation and Eco-environment, Chinese Academy of Sciences, Yangling, Shanxi, 712100, China;
3. Graduate University of the Chinese Academy of Sciences, Beijing, 100049, China

Keywords:: Maize root system; profile distribution; water stress; heterosis; water use efficiency

CLC:: S152.7

DOI:: -

Abstract:: The soil column experiment with 3 maize(Zea Mays L.) genotypes(F1 hybrid HD4,♂ 803 and ♀ T4) was conducted to study the profile distribution of root system under water stress and sufficient water supply conditions(40%～45% and 75%～80% of field capacity).The results showed that water stress significantly decreased the total root weight,total root length and total root system surface area of 3 maize genotypes except the total root weight of ♂.As to the profile distribution of root system,water stress distinctively reduced the root weight and root surface area of both F1 and ♀ in upper soil layers,greatly declined the root length of F1 in upper soil layers and of ♂ and ♀ in lower soil layers.The results indicated that F1 decreased the percent of root in upper soil layers and increased it in lower soil layers in response to water stress.The percent of root in lower dry soil layers of F1 was higher than the parents,which led to higher biomass accumulation and water use efficiency.

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