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XIE Ru-lin,TAN Hong-wei,ZHOU Liu-qiang,HUANG Mei-fu. Study on the recovery rate of K fertilizer under no runoff and no leaching conditions[J]. Journal of South China Agricultural University, 2005, 26(1): 36-41. DOI: 10.7671/j.issn.1001-411X.2005.01.010
Citation: XIE Ru-lin,TAN Hong-wei,ZHOU Liu-qiang,HUANG Mei-fu. Study on the recovery rate of K fertilizer under no runoff and no leaching conditions[J]. Journal of South China Agricultural University, 2005, 26(1): 36-41. DOI: 10.7671/j.issn.1001-411X.2005.01.010

Study on the recovery rate of K fertilizer under no runoff and no leaching conditions

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  • Under pot culture conditions with no runoff and no leaching, the recovery rate of K fertilizer of the 10 major soil types of Guangxi were investigated and the values ranged from 79.0% to 93.8%, with an average of 87.5%. The correlation of the recovery rate of K fertilizer to soil available K after harvest was negative and very significant, and so was to soil cation exchange capacity (CEC). The calculation ways of the supply of soil K influenced the recovery rate of K fertilizer very greatly. The calculation of supply of soil K should be based on the variations of soil K status between planting and after harvesting and the buffer property of soil K, and so as the recovery rate of K fertilizer.

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