摘要
以降解腐熟的桐籽饼粕为基质,加入解钾菌制成生物有机肥.将解钾菌和生物有机肥加入三种旱地土壤,室温下培养100d,分析测定土壤中速效钾和缓效钾的变化情况.研究结果表明,该生物有机肥能极显著增加土壤速效钾水平,且土壤速效钾增加的数量与土壤本身的速效钾供给水平有关,土壤速效钾供给水平低的土壤增加最多,土壤速效钾供给水平高的土壤增加则较少;对土壤缓效钾的影响亦与土壤速效钾供给水平有关,在土壤速效钾供给水平较低的土壤中,生物有机肥能促进土壤缓效钾向速效钾的释放,土壤缓效钾水平降低,而在土壤速效钾供给水平较高的土壤中,生物有机肥中的解钾菌能促进难溶性矿物态钾的分解释放,土壤速效钾和缓效钾水平同步增加.
Microbial organic fertilizer is made of potassium bacteria and degraded tung meal. Three kinds of upland soil are treated with potassium bacteria and microbial organic fertilizer under room temperature for 100 days to testify the change of available K and slowly available K. The results of the research dem- onstrate that the microbial organic fertilizer significantly enriches available K, and the increase is related to the supply level of the soil itself; the microbial organic fertilizer also promotes the transformation from slowly available K into available K, while potassium bacteria degrade mineral potassium. As a result, the quantity of available K and slowly available K rises synchronously.
出处
《湖北民族学院学报（自然科学版）》
CAS
2012年第4期418-420,439,共4页
Journal of Hubei Minzu University(Natural Science Edition)
基金
湖北省教育厅重点项目(D20092904)
恩施州科技局2010年资助项目(桐粕基生物有机肥生产中关键微生物发酵工艺研究)
关键词
生物有机肥
旱地土壤
速效钾
缓效钾
microbial organic fertilizer
upland soil
available K
slowly available K
