不同地势对大豆重迎茬障碍的影响  

Impacts of Different Terrains on Continuous Soybean Cropping Barrier

作　　者：李春杰[1] 许艳丽[1] 潘凤娟[1] 孙玉秋[1] 韩新华[1] 张谦[2] 

机构地区：[1]中国科学院东北地理与农业生态研究所,黑龙江哈尔滨150081 [2]黑龙江省巴彦县农业技术推广中心,黑龙江巴彦151800

出　　处：《大豆科学》2008年第4期629-632,共4页Soybean Science

基　　金：哈尔滨市重大科技攻关资助项目(2006AA6AN031);黑龙江省“十一五”科技攻关资助项目(GA06B101-1-5);国家“十一五”科技支撑计划资助项目(2006BAD21B01-15)

摘　　要：大豆重迎茬障碍研究已开展多年,但同一土壤类型不同地势对大豆重迎茬障碍的影响程度尚不十分清楚,为了探讨这一问题,选择丘陵区(岗地)、平原区(平地)和低湿区(洼地)进行大豆正茬、迎茬和重茬试验,在大豆生育期调查生长发育和产量。结果显示:低湿区和平原区3种茬口大豆出苗率、株高、根瘤鲜重、植株干重和面积指数均明显高于丘陵区,低湿区大豆生育后期植株干重和面积指数稍高于平原区,3种地势大豆各项生育指标均表现为正茬>迎茬>重茬。总体上低湿区产量最高,其次是平原区,丘陵区产量最低,并且低湿区重迎茬减产幅度较小,丘陵区减产幅度最大。所以,干旱年份丘陵区大豆重迎茬障碍大于平原区大于低湿区。Continuous soybean cropping barrier was studied for many years, but the impact degrees of continuous soybean cropping with different terrains on growth,development and yield in different periods were not very clear. In order to explore the problems, emergence rate ,fresh weight of root nodule, dry weight of plant, leaf area index of soybean and yield were investigated in hillock,plain and billabong,which showed that the items in plain and billabong were significantly higher than hillock during dry year, and that dry weight of plant and leaf area index of soybean in billabong were slightly higher than plain in R6. At the same time, the items of wheat- corn- soybean were best, then soybean- corn- soybean, soybean- soybean were worst. Yield of soybean in billabong was the highest, then plain, that of hillock was the lowest, and degree of yield declining of soybean-corn-soybean and soybean-soybean in billabong was relatively less, but that of hillock was more serious. Therefore, continuous soybean cropping barrier in hillock was more than plain which was more than billabong in dry years.

关 键 词：大豆 重迎茬 地势 生长发育 产量 

分 类 号：S565.1[农业科学—作物学]