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Position: Home > Articles > Variation Characteristics Effective Precipitation and Water Requirement of Cassava in Guangxi from 1959 to 2015 Water Saving Irrigation 2020 (2) 80-82+87

1958-2015年广西木薯有效降雨量和需水量的变化规律

作  者：
吴卫熊;莫明珠
单  位：
河北工程大学水电学院
关键词：
木薯;有效降雨;需水量;水分亏缺指数;变化规律
摘  要：
基于1958-2015年南宁站、北海站、玉林站、龙州站气象站的气象资料以及2014-2015年木薯生育期的观测资料,采用有效降雨经验公式和Penman-Monteith公式分别计算了木薯主产区内有效降雨量和木薯各生育期的需水量。结果表明:近60年来,广西木薯主产区木薯全生育期有效降雨量和需水量均呈现下降的趋势。除了桂南区(北海站)木薯播种至苗期降雨量充足外,其他主产区的各生育期均出现不同程度的缺水,苗期-块根形成期、块根形成期-块根膨大期缺水尤为严重;广西木薯主产区木薯生育期缺水量和水分亏缺指数呈现东南小、西北大的分布特点。
译  名：
Variation Characteristics Effective Precipitation and Water Requirement of Cassava in Guangxi from 1959 to 2015
作  者：
WU Wei-xiong;MO Ming-zhu;School of Water Resources and Hydropower Engineering, Hebei University Of Engineering;Guangxi Institute of Water Resources Research;Key Laboratory of Water Engineering of Guangxi;
关键词：
cassava;;effective precipitation;;water requirement;;water deficit index;;variation characteristics
摘  要：
Based on the meteorological data of Nanning station, Beihai station, Yulin station and Longzhou station from 1958 to 2015 and the observation data of cassava growth period from 2014 to 2015, the empirical formula of effective rainfall and Penman-Monteith formula were used to calculate the effective rainfall in the main cassava producing areas and the water demand in each growth period of cassava, respectively.The results showed that over the past 60 years, the available rainfall and water demand of cassava in the whole growing period of cassava in the main cassava producing areas in Guangxi showed a decreasing trend. With the exception of cassava in southern Guangxi(Beihai station) with sufficient rainfall from sowing to seedling stage, water shortage of different degrees occurred in all growth stages of other main producing areas, especially in seedling stage-root formation stage and root formation stage-root expansion stage. The indexes of water shortage and water deficit in cassava growing period in main cassava producing areas in Guangxi are small in the southeast and large in the northwest.

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