摘要
海河流域黑龙港低平原已种植紫花苜蓿4.7万公顷。1986—1988年,对该类地区的南皮县人工苜蓿草地的土壤养分状况、草地群落组成、地上部生物量季节性变化、不同年龄苜蓿地产草量、苜蓿盖度与苜蓿和杂草生物量关系、农艺措施对苜蓿产草量影响,进行了系统的调查研究。
There are 47 thousands ha alfafa planted in Heilonggang Low Plain of HAIHE Watershed From 1986 to 1988, We have systematically investigated soil nutrients, pasture population structure, biomass changes with different season, the yeild with different age, the cover rate of alfafa, the relations between the biomass of alfafa and weeds and the impact of culture practices on the yeild of alfafa, We also analysed the problems of increasing producttivity and pasture construction.
出处
《草业科学》
CAS
CSCD
北大核心
1990年第3期12-14,19,共4页
Pratacultural Science
