摘要
土壤水分状况是决定牧草生长发育、需水量和产量的主导因子。因此,本文对青贮玉米和燕麦的需水量进行了试验研究,分析了人工牧草的土壤水动态和需水规律。结果表明:土壤水动态主要受降雨、灌溉和地下水埋深的影响;青贮玉米需水高峰值出现在7月上旬至8月中旬,其需水强度最大可达7.3 mm/d,阶段需水模系数最大为37.6%;燕麦需水高峰值出现在7月下旬至8月下旬,其需水强度最大可达6.9 mm/d,阶段需水模系数最大为24.5%。该成果为节水灌溉制度的制定和灌溉预报等提供了科学依据。
The soil moisture condition is the dominant factor for the pasture growth,water demand and yield.The paper tested the water requirements of ensile maize and oat and analyzed the soil-water dynamic and the water need rule of cultivated forage grass.The result showed that the soil-water dynamic is influenced by precipitation,irrigation and the water table of ground water.The peak of water needs for ensile maize appeared from early July to middle August.The maximal water need strength can reach 7.3mm/d,the maximal water need coefficient can reach 37.6%.The peak water need of oat appeared from late July to late August.The water need strength can reach 6.9mm/d,the maximal coefficient of stage water needs coefficient can reach 24.5%.The results supply the science base for water saving irrigation and irrigation forecast.
出处
《水资源与水工程学报》
2010年第6期12-14,共3页
Journal of Water Resources and Water Engineering
基金
科技部农业科技成果转化资金项目(2008GB23320435)
中国水科院科研专项(人工牧草水肥调控技术研究)
关键词
人工牧草
土壤水动态
需水强度
需水模系数
cultivated forage grass
soil-water dynamic
water needs strength
water needs coefficient
