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Research and Practice of Ag-lime Application for Ameliorating Acid Soils in Yunnan

IPNI-1999-CHN-YN10

Overview Related

Research and Practice for Aglime Application for Ameliorating Acid Soils in Yunnan, 2003 Past research has focused on identifying yield-limiting soil nutrients, screening suitable aglime materials, and determining the optimal rates, timing, and placement for aglime in crops sensitive to low soil pH. Ground calcite limestone was selected as the best lime source for the lateritic soil and ground dolomite was most suitable for the yellow earth soil. Optimal aglime rates ranged between 2. 5 to 3. Read more

Year of initiation:1999
Year of completion:2004

Interpretive Summary

2003

Research and Practice for Aglime Application for Ameliorating Acid Soils in Yunnan, 2003 Past research has focused on identifying yield-limiting soil nutrients, screening suitable aglime materials, and determining the optimal rates, timing, and placement for aglime in crops sensitive to low soil pH. Ground calcite limestone was selected as the best lime source for the lateritic soil and ground dolomite was most suitable for the yellow earth soil. Optimal aglime rates ranged between 2. 5 to 3.

2002
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The Research and Practice of Aglime Application for Ameliorating Acid Soils in Yunnan, 2002 . The majority of soils in Yunnan Province are acidic, with pH measurements ranging between 4. 0 to 5. 5. Acid-induced adverse soil conditions include reduced availability of indigenous and applied sources of soil phosphorus (P), potassium (K), and various other nutrients. To date, aglime application to farmland is not widely practiced.

2001

The research and practice of ag-lime application for ameliorating acid soils in Yunnan, 2001 The majority of soils in Yunnan province are acidic with pH ranging from 4. 0 to 5. 5. Soil acidity can considerably reduce the availability of indigenous soil phosphorus (P), potassium (K), and other nutrients as well as those applied as fertilizers. Yunnan currently has no history of lime application to farmland as an agronomic practice to improve soil fertility and productivity.

2000

The research and pratice of aglime application for ameliorating acid soils in Yunnan province, 2000 The majority of soils in Yunnan province are acidic with pHs in the range of 4. 0 to 5. 5. Soil acidity adversely affects availability of indigenous soil P and K and those nutrients applied as fertilizers. Currently, Yunnan province has no history of applying aglime to farmland as an agronomic practice to improve soil fertility and productivity.

1999

The research and practice of ag-lime application of ameliorating acid soils in Yunnan province, 1999 Yunnan province has about 8 M ha of acid soils with pHs ranging from 4. 0 to 5. 5. These soils usually have problems associated with low fertility and often suffer from aluminum (Al) and iron (Fe) toxicity if not properly managed. Correct application of lime can increase crop production on most of these low yielding soils. This eventually translates into higher use of P and K fertilizers.

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Project Leader

Hong Lifang, Soil and Fertilizer Institute, Yunnan Academy of Agricultural Sciences

Project Cooperators

Fu Yanbo

IPNI Staff

Shihua Tu

Location

Asia \ Eastern Asia \ CHN \ Yunnan

Topics

4r rate, soil acidity and liming

maize

Calcium (Ca)