山东农业科学Issue(1)：113-118,6.DOI:10.14083/j.issn.1001-4942.2016.01.026
基于大豆生长期需水探讨降水资源与干旱风险度
Research on Rainfall Resources and Drought Risk Degree Based on Water Demand during Soybean Growth Period
摘要
Abstract
According to Yebaishou and Chaoyang weather station’ s precipitation data from 1954 to 2013 and water consumption data during soybean growth period obtained from crop irrigation experiments, the at-mospheric precipitation variation characteristics, drought characteristics and drought risk degree in soybean growth period were studied in Chaoyang area of Liaoning Province by the methods of linear trend variation, dry and wet index, drought risk degree.The results showed that the precipitation had a decreasing trend during the whole growth period of soybean.In which, the precipitation showed an increasing trend from sowing to flowering stage, while that showed a decreasing trend from flowering to mature stage.The average dry ratio was 6.1% during the whole growth period of soybean, and the annual drought ratio was 13.3%.The average drought risk degree was 57.6%.The water shortage ratio and the drought frequency were 7.9%and 50.0%respectively from sowing to seedling emergence, while those were 5.6%and 28.3%respectively from seedling emergence to branching.The precipitation surplus ratio and the drought frequency were 24.9% and 10.0%respectively from branching to blossom, while those were 20.8%and 16.7%respectively from blossom to pod filling.The water shortage ratio was 11.6%, and the drought frequency was 33.3% from pod filling to ma-ture.The precipitation decreasing and drought risk rising trends in Chaoyang area of Liaoning Province had in-creasing influences on agricultural production, and the water shortage was becoming more and more serious.Therefore, the development and utilization of surface water, groundwater, and cloud water resources would be the basic guarantee of crop harvest.关键词
大豆/降水/需水/干湿指数/干旱风险度/朝阳Key words
Soybean/Precipitation/Water demand/Dry and wet index/Drought risk/Chaoyang分类
农业科技引用本文复制引用
张国林,戴海燕,尹洪涛..基于大豆生长期需水探讨降水资源与干旱风险度[J].山东农业科学,2016,(1):113-118,6.基金项目
科技部农业科技成果转化资金项目“农田土壤含水量监测预报技术推广应用” （）
