Suitability analysis of farmland for corn millet growing in Fugu County
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DOI:10.16302/j.cnki.1000-7601.2015.01.031
Key Words: corn millet  soil nutrient  cultivated land  suitability evaluation
Author NameAffiliation
ZHANG Yi, CHANG Qing-rui, ZHAO Ye-ting, SUN Li-ping (西北农林科技大学资源环境学院 陕西 杨凌 712100) 
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Abstract:
      In order to develop and utilize the scarce land resources more rationally, while maintain and improve the productivity of cultivated land, this paper uses Fugu County data from “Measured Soil Fertilizer” project in 2011 and the “3414” field fertilizer experiment, in combination with GIS technology platform and comprehensive utilization of geostatistics, Delphi method, comprehensive evaluation method, to evaluate the suitability of corn cultivation in Fugu County. For millet planting, soils of Fugu County contains low level of total organic matter (<10 g·kg-1) and available phosphorus (5~10 mg·kg-1), medium level of alkali-hydrolysable nitrogen (25~40 mg·kg-1) and available K(70~100 mg·kg-1). The suitability of corn growing varies with location, with river terrace being highly suitable (accounting for 11.20% of the total arable land area) or suitable (28.99%) whereas hill areas being marginally suitable (54.62%) and not suitable (5.19%). It should be reasonably increase the content of alkali-hydrolysable nitrogen, available phosphorus and soil organic matter, maintain the content of soil available potassium. Meanwhile, attention should be paid to improve soil texture, increase the ability of soil drought resistance, and fertilizer conservation, thus enhancing the suitability of corn millet.