【摘要】 在亚热带丘陵区红壤幼龄茶园经过4年稻草覆盖及间作三叶草田间小区试验,对土壤剖面分析结果表明,稻草覆盖及间作三叶草均能明显增加土壤表层有机C、碱解N、有效P,增加土壤微生物量C、N、P。剖面中土壤有机C、微生物量C、全N、碱解N、土壤微生物量N、全P、有效P、微生物量P随深度的增加而递减。稻草覆盖影响到40 cm土层左右,间作白三叶草影响到20 cm左右。0~20 cm土层微生物量C/有机C T2>T3>T1,3个处理微生物量N/全N在1.02~2.74之间,微生物量P和全P比值在2.27~13.1之间。亚热带丘陵区红壤幼龄茶园土壤微生物量碳与土壤有机碳C、碱解N、微生物量N、有效P、微生物量P具有极显著的正相关关系(P<0.01),与全N、全P呈显著的正相关关系(P<0.05)。更多还原

【Abstract】 Through covering in young tea plantations straw in four years of red earth and experiment that deal with of three leaf grasses of intercropping,the result indicate straw cover and intercropping three leaf grass can increase soil top layer organic matter,alkali-hydrolyzable N,available P obviously,have increased microbial C,N,P.Soil organic C in the section,microbial biomass C,the whole N,alkali-hydrolyzable N,soil microbial biomass N,the whole P,available P,microbial biomass P also with increase of the depth.0～20 cm soil layer microbial biomass carbon/organic carbon T2>T3>T1,the ratios of three microbial biomass nitrogen and the whole nitrogen dealt with are among 1.02～2.74,three microbial biomass phosphorus/entire phosphorus ratios between 2.27～13.1.更多还原