Spatial variability of soil moisture and aboveground biomass of Medicago sativa under long term continuous planting

Acta Prataculturae Sinica ›› 2009, Vol. 18 ›› Issue (4): 41-46.

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Spatial variability of soil moisture and aboveground biomass of Medicago sativa under long term continuous planting

WANG Jun^1,2, LIU Wen-zhao¹, ZHONG Liang-ping¹, LI Yu-shan²

1.Institute of Soil and Water Conservation, Chinese Academy of Sciences and Minister of Water
Resources, Yangling 712100, China; 2.Department of Urban and Resource Science,
Northwest University, Xi’an 710127, China

Received:2008-11-04 Online:2009-08-20 Published:2009-08-20

Abstract

Abstract: Impacts of fertilization and sampling position on soil moisture and aboveground biomass of Medicago sativa were studied in a long term, in situ experiment. After 19 years continuous M. sativa planting, fertilization had no impact on M. sativa aboveground biomass. However, plant height declined and accumulation of aboveground biomass decreased towards the center of the experimental plot, like a biomass funnel. Differences due to sampling position were much bigger than those due to fertilization. Soil moisture in the layers below 1 m also resembled a moisture funnel and significantly correlated with M. sativa aboveground biomass, which indicated that subsoil moisture may be crucial to M. sativa growth in long term continuous plantings.

CLC Number:

WANG Jun, LIU Wen-zhao, ZHONG Liang-ping, LI Yu-shan. Spatial variability of soil moisture and aboveground biomass of Medicago sativa under long term continuous planting[J]. Acta Prataculturae Sinica, 2009, 18(4): 41-46.

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Spatial variability of soil moisture and aboveground biomass of Medicago sativa under long term continuous planting

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