摘要
在草甸白浆土上对草木樨、秣食豆、黑麦草根茬的培肥增产效应进行了5年的研究,试验结果表明,强大的绿肥根系能够改善土壤理化性质,提高后作物产量。以5年粮豆总产量计,粮草轮作的产量较之粮豆轮作相等或略低。但在粮草轮作中,绿肥地多收鲜草(饲料)1350～1500kg/亩,总效益高于粮豆轮作。在绿肥全部翻压作肥料同只以绿肥根茬还田的对比中。后者的效益大于前者。
The effect of root residues of Melilotus officinalis,Glycine gra- cils and rye grass on soil improvement and crop production was studied for five years.The lesults indicated that the strong root system of green manure are capable of improving physical and chemical properties of soil and increasing crop production.Comparing with cereal-soybean rotation,cereal-green manure rotation will get either equal or a little less harvest of cereals,but getting an extra harvest of green manure(20.25～22.5 tons/ha),and thus the totalbenefit is higher for cereal-green manure rotation.The total benefit of turning over root residue of green manure is higher than turning over the whole plants.
出处
《中国农业大学学报》
CAS
CSCD
北大核心
1990年第S4期83-87,共5页
Journal of China Agricultural University
关键词
绿肥根茬
翻压
residue of green manure
turn over
