不同土壤水分对洛旱2号小麦产量的影响  

Effects of Different Water Contents in Soil on the Output of Wheat Luohan2

作　　者：金松灿 

机构地区：[1]洛阳市种子管理站,河南洛阳471000

出　　处：《河南职业技术师范学院学报》2004年第4期11-13,共3页Journal of Henan Vocation-Technical Teachers College

摘　　要：干旱是丘陵旱区小麦产量的主要限制因子,本研究通过对底墒和生育期模拟降水,在不同土壤水分条件下,对根系、籽粒产量、水分利用率等进行了相关分析,结果表明:随着耗水量的增加,分蘖、根系增多,籽粒产量也随之提高,丰+丰的生产率为1.28,旱+旱的生产率仅为0.75,分析还认为不同土壤水分,不同耕层根系有明显的差异。0～40cm土层根量最多,占总量三分之二,40～200cm土层占三分之一。Water is a main factor to influence the output of wheat in the draught hill areas.The relative analyses of the root system,the grain weight,and the water using efficiency in different water contents in soil showed that the tillering,root systems and the grain weight increased with the increase of the assumption of water,the productivity of water(soil) plus water (waterfall in growing period) was 1.28,and the productivity of drought (soil) plus drought (waterfall in growing period)was 1.28.The root systems had great differences in different contents of soil water and layers of planting soil.The 0-40 cm soil layer occupies the most roots,while 40-200cm layer has one third roots.

关 键 词：土壤水分 根系 洛旱2号 籽粒产量 小麦产量 根量 耕层 生产率 增加 总量 

分 类 号：S512[农业科学—作物学] S513