【摘要】 通过培育试验研究了5种有机肥对4种植烟土壤速效磷、钾含量的影响。结果表明,4种植烟土壤及其施用有机肥后,速效磷含量变化呈单峰、双峰曲线两种类型,而速效钾含量变化则呈直线型;有机肥对速效磷影响依次为猪粪>鸡粪>饼肥>牛粪>稻草,对速效钾影响依次为稻草>鸡粪>饼肥>猪粪>牛粪,且随有机肥用量增加而提高,土壤磷素供应时间也前移;磷素最大释放率次序为猪粪>饼肥>鸡粪>牛粪>稻草,钾素最大释放率为稻草>鸡粪>饼肥>猪粪>牛粪,且出现在灰砂泥田的频率较高。更多还原

【Abstract】 Effects of five organic manures on the content of available phosphorus and potassium in four tobacco-growing soils were studied by culture experiments. The results showed that there were two change types of the content of available phosphorus, including a single peak curve type and a double curve type, and the content of available potassium always appeared the linear type in four tobacco soils with organic manures. The effects of organic manures on available phosphorus were pig manure>chicken manure>cake manure>cattle manure>straw, the effects of organic manures on available potassium were straw>chicken manure>cake manure>pig manure>cattle manure, and the content of available phosphorus and potassium increased with the increase of organic manure rates; Maximal release rate of phosphorus element was pig manure>cake manure>chicken manure>cattle manure>straw, and that of potassium element was straw>chicken manure>cake fertilizer>pig manure>cattle manure, and maximal release occurred at high frequency in sandy gray soil.更多还原