摘要： 本研究表明，地膜花生和露地花生全株干物质积累，荚果体积增长和荚果产量形成过程，均可用S曲线数学模型（logistic分布）来描述：①地膜花生全株干物质积累的增长速率转折点出现在出苗后76-82天期间，而露地花生为出苗后69-70天。在其转折点前后是干物质积累的高峰期。②地膜花生单株荚果总体积增长速率转折点为结荚期后25天，露地花生为28天。在转折点前后是其荚果体积增长的高峰期。③地膜花生单株荚果干物质积累增长速率在饱果期后28天达到转折点；露地花生为18天达到转折点。转折点前后是其单株荚果总干物质积累的高峰期。

关键词: 地膜, 花生, 干物质

Abstract: The results show that the plant dry-matter accumulation,the pod-yielding and the pod-volume increasing of peanut under film-mulching(FM)and no-mulching(NM)condi-tion can all be described by the logistic model.(1)The turning point of the plant dry-matter increasing rate appeared on July 20th,1986(July 24th,1987)for the peanut growing unber FM,but on July 12th-July 13th,1987 unber NM.The greatest increasing period is just around the turing point.(2)Turning of the pod-voiume increasing rate appeared on July 13rd,1987 for the peanut growing under FM,but on July 24th,1987 under NM.The greatest increasing period is around the turning point.(3)The turning point of the increasing rate of the pod dry-matter per plant appeared on Aug.5th,1987 under NM.And,the greatest increasing period is around the turning point.

Key words: Peanut film-mulching, Logistic model