种植绿肥对板栗林土壤养分和生物学性质的影响

为了研究不同绿肥播种对板栗林土壤性质的影响，布置了对照，黑麦草，白三叶，大绿豆，黑麦草、白三叶和大绿豆3种混播等5个处理的田间试验.结果表明:4个绿肥播种处理的土壤全氮和有机质含量均明显高于对照处理(P0.05)；播种绿肥显著增加了土壤酶活性和土壤水溶性有机碳及微生物量碳的含量(P0.05)；播种绿肥在当年对土壤水解氮、有效磷和速效钾含量无显著影响.对4个播种绿肥处理进行比较发现，种大绿豆对提高土壤全氮、有机质含量和土壤酶活性效果最好. 

Effects of green manure on soil nutrients and bio-properties of Castanea mollissima Blume plantations

Intensive management on Castanea mollissima Blume plantations with weeds being cleared away is popular.However,it can be predicted that soil qualities would be changed as a result.The objective of this study is to test the effects of green manure on soil nutrients and bio-properties under C.mollissima plantations.A manure trial with planting rye grass,white clover,green gram,the mixture of three of them,and the control with no vegetation(CK) was conducted.It was found that soil total organic carbon(TOC) and total nitrogen(TN) were much higher(P<0.05) in the plots planted with green manure than those in the control,and the similar tendency was true for soil microbial biomass carbon (MBC) and water-soluble organic carbon(WSOC).Among the treatments with different species of green manure,green gram was the best in improving soil TOC,TN and enzymatic activity,while there was no improvement to be observed in soil available N,P,and K after one year' manure trial.