Acta Agrestia Sinica

›› 2010, Vol. 18 ›› Issue (6): 907-910.DOI: 10.11733/j.issn.1007-0435.2010.06.029

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Water Distribution Pattern and Influence on Alfalfa Seed Yield Using Subsurface Drip Irrigation

MENG Ji-meng1,2, LI Wei-jun1   

  1. 1. Xinjiang Key Laboratory of Grassland Resource and Ecology, College of Pratacultural Engineering of Xijiang Agricultural University, Urumqi, Xinjiang 830052, China;
    2. Xinjiang Academy of Agricultural Reclamation Sciences, Shihezi, Xinjiang 832000, China
  • Received:2010-03-18 Revised:2010-11-03 Online:2010-12-15 Published:2010-12-15

苜蓿种子生产田地下滴灌水分分布格局及其对苜蓿种子产量的影响

孟季蒙1,2, 李卫军1   

  1. 1. 新疆农业大学草业与环境科学学院, 新疆草地资源与生态重点实验室, 新疆, 乌鲁木齐, 830052;
    2. 新疆农垦科学院, 新疆, 石河子, 832000
  • 通讯作者: 孟季蒙,E-mail:liweijunxj@yahoo.cn
  • 作者简介:孟季蒙(1977- ),男,河北人,硕士研究生,研究方向为草地资源与生态,E-mail:smmdk@126.com
  • 基金资助:
    新疆维吾尔自治区教育厅创新群体项目(XJEDU2007G02);苜蓿原种基地扩建与高产技术体系研究;新疆维吾尔自治区发改委项目资助

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Abstract: The focus of this study is to increase the output and profitability of alfalfa seeds.Subsurface drip irrigation(SDI) conditions are used with alfalfa seed breeding.The possibility of increasing alfalfa seed production is investigated by studying water distribution of SDI in the soil and yield of alfalfa.Results show that the biggest moist radius of SDI is 65%~80% of the soil moisture(W1).The moist radius is 40 cm in the surface layer and the forth layer and 50 cm in the secondary and the third layer under W1.Vertically,the moist peak can move upward to the surface and downward to 40 cm place allowing water to easily reach the roots of alfalfa.The highest seed yield of W1 is 909.62 kg·hm-2,which is distinctly higher than CK(611.39 kg·hm-2)(P<0.01).This indicates that the application of SDI in alfalfa seed production has potential to increase yield.

Key words: Alfalfa seed production, Subsurface drip irrigation, Water distribution of the soil

摘要： 本试验为提高苜蓿(Medicago sativa L.)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分布和种子产量的研究,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:在田间相对持水量为65%~80%(W1)时,湿润体的体积最大,表层(0~10 cm)和第4层(30~40 cm)的湿润半径均为40 cm,第2层(10~20 cm)和第3层(20~30 cm)的湿润半径均为50 cm。垂直方向,湿润峰向上可运动到地表(0 cm),向下达地面以下40 cm。水分能够到达宽行80 cm,窄行40 cm播种方式下苜蓿的根系位置。并且,在田间相对持水量的65%~80%的种子产量最高,为909.62 kg·hm-2,高于对照的种子产量(611.39 kg·hm-2)(P<0.01),差异极显著。说明地下滴灌应用于苜蓿种子生产,能够起到的增产效果。

关键词: 苜蓿种子, 地下滴灌, 土壤水分分布

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