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Research and Extension of Ag-lime Application in Sichuan

IPNI-1999-CHN-SC15

Overview Related

Research and Extension of Aglime Application in Sichuan Agriculture, 2003 Acidification of vegetable-producing soils is a common problem world-wide and generally is the result of prolonged reliance on heavy dressings of nitrogen (N) fertilizers. Clubroot disease, a common problem in crucifer vegetables, is attributed to soil acidity. The disease is widespread in the Chengdu vegetable production region and is especially destructive for some crop species (e. g. Read more

Year of initiation:1999
Year of completion:2004

Interpretive Summary

2003

Research and Extension of Aglime Application in Sichuan Agriculture, 2003 Acidification of vegetable-producing soils is a common problem world-wide and generally is the result of prolonged reliance on heavy dressings of nitrogen (N) fertilizers. Clubroot disease, a common problem in crucifer vegetables, is attributed to soil acidity. The disease is widespread in the Chengdu vegetable production region and is especially destructive for some crop species (e. g.

2002
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Research and Extension of Aglime Application in Agriculture in Sichuan Province, 2002 . The Sichuan basin presently has about 3. 27 million hectares (M ha) of acid farmland soils (pH <6. 5), among which 49,000 ha have pH values below 5. 5. Soil acidity has generally been a result of extensive weathering and a long geo-history and thus, has poor productivity and a number of fertility problems.

2001

Research and extension of ag-lime application in agriculture in Sichuan province, 2001 In the Sichuan basin, about 3. 27 million hectares (ha) of farmland have soil pH below 6. 5, among which 49,000 ha have pH below 5. 5. Besides soil acidity, these soils usually have productivity problems related to a number of nutrient imbalances.

2000

Research and extension of ag-lime application in agriculture in Sichuan province, 2000 This project was initiated in 1999 and is aimed at determining the optimal rates, timing and placement of aglime for Sichuan province through a thorough study on the relationship between soil acidity and lime requirement. Initial experimentation found the traditional method used for determining the lime requirement was inefficient.

1999

Research and extension of ag-lime application in agriculture in Sichuan province, 1999 This project was aimed at studying the limiting factors of acid soils in Sichuan province. The province has 491,000 ha of unlimed acid soils with pH values below 5. 5. The research is designed to identify the relationship between soil acidity and lime requirement and determine the optimal rates, timing, and placement of aglime.

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Project Leader

Feng Wenqiang, Soil and Fertilizer Institute, Sichuan Academy of Agricultural Sciences

Project Cooperators

Qin Yusheng

IPNI Staff

Shihua Tu

Location

Asia \ Eastern Asia \ CHN \ Sichuan

Topics

4r rate, soil acidity and liming

maize

Calcium (Ca)