CAJ | 학술논문

利用5年连续种植、翻压紫云英的定位试验稻田为平台，研究了紫云英－单季水稻种植体系下土壤结构性能及有机碳含量的变化。研究结果表明：与不施肥对照相比，长期种植翻压紫云英能显著提高土壤有机碳及易氧化有机碳含量，促进土壤大颗粒团聚体的形成，降低土壤容重，增加土壤孔隙度；在4个处理中，翻压紫云英＋施用化肥处理的土壤微生物量C、微生物量N含量均最高，土壤活性有机碳比例高达38．5％。
이용5년련속충식、번압자운영적정위시험도전위평태，연구료자운영－단계수도충식체계하토양결구성능급유궤탄함량적변화。연구결과표명：여불시비대조상비，장기충식번압자운영능현저제고토양유궤탄급역양화유궤탄함량，촉진토양대과립단취체적형성，강저토양용중，증가토양공극도；재4개처리중，번압자운영＋시용화비처리적토양미생물량C、미생물량N함량균최고，토양활성유궤탄비례고체38．5％。
By using the location test paddy field in which milk vetch ( Astragalus sinicus) was planted and overturned for con-tinuous 5 years as platform , we studied the changes in the properties of surface soil structure and the content of organic carbon in milk vetch -single-cropping rice cultivation system .The results showed that: in comparison with the control ( non-fertiliza-tion) , chronically planting and overturning milk vetch could significantly increase the contents of organic carbon and easily -oxida-tive organic carbon in soil , promote the formation of large-particle aggregations in soil , reduce soil bulk density , and enhance soil porosity;among 4 treatments , the treatment of planting and overturning milk vetch combined with applying chemical fertilizer ob -tained the highest contents of both soil microbial biomass carbon and microbial biomass nitrogen , as well as the highest soil active or-ganic carbon proportion (38.5%).