绿洲灌区小麦间作玉米种植密度优化效应研究  

Optimize Densities of Wheat and Maize Intercropping in An Oasis Region

作　　者：陈国栋[1] 万素梅[1] 赵宏福 陈锦锋 柴强 Chen Guodong;Wan Sumei;Zhao Hongfu;Chen Jingfeng;Chai Qiang(College of Plant Science and Technology, Tarim University, Alar, Xinjiang 843300;Gansu Provincial Key Lab of Arid - land Crop Science, Lanzhou, Gansu 730070)

机构地区：[1]塔里木大学植物科学学院,新疆阿拉尔843300 [2]甘肃省干旱生境作物学重点实验室,甘肃兰州730070

出　　处：《塔里木大学学报》2018年第1期110-117,共8页Journal of Tarim University

基　　金：国家自然科学基金项目(31360323);塔里木大学校长基金项目(TDZKJC201606)

摘　　要：为明确间作系统的密度效应,通过大田试验,研究了密度对小麦间作玉米产量的影响,并对密度与间作作物产量的相关关系进行了分析。结果表明,不同密度下,间作各处理的LER均大于1,表明间作具有提高土地利用效率的作用。密度与间作组分产量呈现二次曲线相关关系,且在本试验设置的密度下(小麦密度在675~900万株·hm-2、玉米密度在7.5~9万株·hm-2范围内),小麦产量随着小麦密度的增加而增加,玉米产量随着玉米密度的增加先增后降,密度为8.25万株·hm-2时可获得最大产量。小麦产量与穗数呈显著正相关关系,玉米产量与穗长、穗行数、行粒数呈显著正相关关系,因此,增加小麦密度是增加间作产量的有效途径。In order to clear the density effect of intercropping system,a field experiment was conducted to investigate the plant density effects on the yields of intercropped wheat and maize,and the relationship between crop densities and yields of intercropped crops. The results showed that for the intercropping treatments with different densities the land equivalent ratio（LER）〉 1,which indicated that intercropping could improve land use efficiency. Positive quadratic relations between crop densities and yields of intercropped wheat or intercropped maize were observed in the field experiment,and within densities 675 ~ 900 plants·m-2 for wheat and 7. 5 ~ 9 plants·m-2 for maize,the wheat yield increased with the increasing of wheat density,and the maize yield first increased then declined with the increasing of maize density,the greatest maize yield was obtained when density was of 8. 25 plants·m-2. The wheat yield was significant positively correlated with the spike number,and the maize yield was significant positively correlated with ear length,rows per ear and kernels per row. Therefore,increasing wheat density is an effective way to increase the yield of intercropping.

关 键 词：间作 密度 产量 相关关系 

分 类 号：S344.2[农业科学—作物栽培与耕作技术]