摘要
为了提高苜蓿种子产量和效益,把地下滴灌引入苜蓿种子生产试验,通过对地下滴灌的水盐分布、苜蓿生长特性和种子产量等方面的研究,探讨地下滴灌应用于苜蓿种子生产的可行性和效果。结果表明,在田间相对持水量的65%～80%(W1)水量下,湿润体的体积最大,水平最大湿润半径均为50cm。垂直最大湿润半径为20cm。水分能够到达40cm×80cm宽窄行播种方式下苜蓿的根系位置;W1处理所得根干物质积累量最高,为25.09g,显著高于其他试验处理(P<0.01),根重顺序为W1>CK>W2>W3。并且,W1处理种子产量最高,为909.62kg/hm2,极显著高于对照的种子产量(611.39kg/hm2)(P<0.01)。说明地下滴灌应用于苜蓿种子生产,能够起到增产效果。
To increase the output and profitability of alfalfa seeds,subsurface drip irrigation（SDI） was introduced into a production experiment of alfalfa seeds.Through the study of salt distribution of SDI in the soil and the growth characteristics of alfalfa,the possible uses and effectiveness in alfalfa production were explored.The biggest moisture content of SDI was 65%-80% of the soil moisture（W1） and the biggest radius was 50 cm horizontally and 20 cm vertically enabling water to reach the roots of alfalfa.The W1 root weight was significantly（P〈0.01） higher（25.09 g） than that of the other treatments and the root weight sequence was W1CK（flooding irrigation）W2（50%-65% of the soil moisture）W3（35%-50% of the soil moisture）.The seed yield of W1 was significantly（P〈0.01） higher（909.62 kg/ha）,than that of the CK（611.39 kg/ha）.The application of SDI in alfalfa production could increase seed yields.
出处
《草业学报》
CSCD
北大核心
2012年第1期291-295,共5页
Acta Prataculturae Sinica
基金
国家牧草产业技术体系项目(CARS-35)资助
关键词
地下滴灌
苜蓿
生长发育
种子产量
subsurface drip irrigation
alfalfa（Medicago）
growth
seed yield
