摘要
研究了经过4年不同培肥措施后红壤茶园土壤微生物量碳变化。结果表明:稻草覆盖后不同比例有机无机肥配施、间作三叶草以及全施化肥处理对土壤微生物量碳均有明显提高;全年土壤微生物量碳年变化都呈现“低—高—低—高”的趋势,且在不同时期对微生物量碳的影响不同;与对照(CK)相比,稻草覆盖+100%有机肥(T1)、稻草覆盖+75%有机肥+25%化肥(T2)、稻草覆盖+50%有机肥+50%化肥(T3)、稻草覆盖+25%有机肥+75%化肥(T4)、100%化肥(T5)和间作三叶草+不施肥(T6)土壤微生物量碳全年平均值分别高出17·05%、32·38%、32·05%、24·30%、26·23%和24·63%,且差异均达到显著水平(P<0·05);土壤微生物量碳与活性有机质、土壤全氮、微生物量氮、微生物量磷呈显著正相关,与速效氮、土壤全磷、土壤全钾、土壤含水量之间关系不显著;与单施化肥和全量投入有机物料相比,有机物和化肥配合施用更有利于提高土壤肥力。
The study on the dynamics of red soil microbial biomass C in tea garden after 4 years different fertilization showed that straw mulching combined with applying organic manure and chemical fertilizer, intercropping white clover, and applying chemical fertilizer could all increase the amount of soil microbial biomass C significantly. The annual variations of soil microbial biomass C all presented the tendency of low-high-low-high, and the effects of fertilization varied with different periods. The annual average of soil microbial biomass C in treatments Tl （ straw mulching ＋ 100% organic manure） , T2 （ straw mulching ＋ 75 % organic manure ＋ 25 % chemical fertilizer）, T3 （ straw mulching ＋ 50% organic manure ＋ 50% chemical fertilizer）, T4 （ straw mulching ＋25% organic manure ＋75% chemical fertilizer）, T5 （100% chemical fertilizer） and T6 （ intercropping white clover） were 17.05% , 32.38% , 32.05% , 24.30% , 26.23% and 24.63% higher than CK, respectively, and the differences were significant （ P 〈 0.05 ）. Soil microbial biomass C had significant positive correlations with soil active organic matter, total nitrogen, and microbial biomass N and P, but no significant correlations with soil available nitrogen, total phosphorus, total potassium, and moisture content. In comparing with applying chemical fertilizer or organic manure alone, their combination was more advantageous in improving soil fertility.
出处
《生态学杂志》
CAS
CSCD
北大核心
2007年第7期1009-1013,共5页
Chinese Journal of Ecology
基金
中国科学院知识新创工程资助项目(KSCX2-YW-N-48-02)
关键词
茶园
不同培肥
土壤微生物量碳
tea garden
different fertilization
soil microbial biomass C.
