摘要
在龙眼(Dimocarpus longgana Lour.)行间种植热研2号柱花草(Stylosanthes guianensis cv.Reyan No.2),观测了龙眼单作区与龙眼-柱花草间作区土壤营养成分、水分和地表温湿度、龙眼生长量和产量、柱花草的鲜草产量。结果表明:龙眼行间种植热研2号柱花草,间种区土壤肥力得到提高,土壤有机质、总氮及微生物细菌数量高于龙眼单作区,土壤容重降低。翻压柱花草后土壤全氮、有机质、有效磷和速效钾显著高于未翻压样地。龙眼行间种植热研2号柱花草,旱季0~20 cm土层土壤水分高于龙眼单作1.679%,20~40 cm土层土壤含水量高于龙眼单作0.833%。在寒冷季节(1月),间种区地表温度在18∶00时高于龙眼单作0.400℃;在炎热季节,间作区地表温度在14∶00时低于龙眼单作0.664℃。间种区龙眼株高、冠幅和地径高于龙眼单作41.00 cm,0.231 m2,1.034 cm,单位面积经济效益高于龙眼单作4830.0元/hm2。
In the present study,soil nutrients,soil moisture,soil surface temperature and humidity,the productivity and fruit yield of Dimocarpus longgana and fresh yield of Stylosanthes were observed and compared between D.longgana monocuhure and D.longgana+S.guianensis intercropping communities.The results showed that the intercropping system can improve soil fertility.Soil organic matter,total nitrogen and bacterial amounts in intereropping system soils were higher than those in monoculture soils.Soil bulk density in intercropping system was lower than that in monocuhure.The total nitrogen,soil organic matter,available phosphorus and available potassium were higher in ploughing S.guianensis soils than those in non-ploughing soils.The D.longgana+S.guianensis could increase soil moisture by 1.679%in 0-20 cm,0.833%in 20-40 cm compared to monoculture;also the intercropping system could increase the ground temperature by 0.400℃at 18:00 in January and decrease the ground temperature by 0.664℃at 14:00 in the hot season,compared with D.longgana monoculture plots.The height,crown and diameter of D.longgana trees in intercropping system were greater than those in monocuhure plot,by 41.00 cm,0.231 m2,1.034 cm respectively.The economic gain of intercropping system could increase 4830.0 yuan/hm2 compared with monoculture.
出处
《云南农业大学学报(自然科学版)》
CAS
CSCD
北大核心
2012年第1期112-116,128,共6页
Journal of Yunnan Agricultural University:Natural Science
基金
云南省应用基础研究面上项目(2008CD182)
云南省技术创新人才培养依托项目:云南省农业科学院热区生态农业研究所科技计划项目(RQS2008-1)
关键词
干热河谷
龙眼和热研
2号柱花草间作
土壤肥力
经济效益
dry-hot arid valley
intercropping system of Dimocarpus longgana Lour.and Stylosanthes guianensis cv.Reyan No.2
soil fertility
economic gain
