基于熵权系数评价模型的白茶节水灌溉模式研究  

A Study on Water Saving Irrigation Mode of White Tea Based on Entropy Weight Coefficient Evaluation Model

作　　者：陈康 王会全[1,2] 陈竞楠[1] CHEN Kang;WANG Hui-quan;CHEN Jing-nan(College of Horticulture and Forest, Fujian Vocational College of Agriculture, Fuqing 350000, Fujian China;College of Horticulture, Fujian Agriculture and Forest University, Fuzhou 350000, China)

机构地区：[1]福建农业职业技术学院园艺园林学院,福建福清350000 [2]福建农林大学园艺学院,福建福州350000

出　　处：《节水灌溉》2020年第4期38-41,共4页Water Saving Irrigation

基　　金：福建省农业厅茶产业重大农技推广项目([2015]48)。

摘　　要：为研究不同节水灌溉模式对白茶生长发育和产量形成的影响,设计2种灌溉方式(喷灌和滴灌)及3种相对含水率控制下限水平(65、75和85),观测白茶鲜/干重、叶面积指数、百芽重和芽叶颜色等指标,同时,构建熵权系数评价模型,综合考虑产量、产值、工程建设经济可行性及灌溉水利用效率等指标,优选节水灌溉方案。结果表明:喷灌下85控水下限处理白茶百芽重、叶面积指数和干重处于最高水平;相同灌溉方式下,提升控水下限使滴灌条件下白茶产量提升2.4~17.7,使喷灌条件下产量提升16.7~30.2;熵权系数评价模型计算结果表明,喷灌条件下75控水下限综合效益最优,熵权系数评价值达到0.96。在该灌溉模式下,白茶产量、产值、节水灌溉工程建设的国民经济内部收益率和灌溉水利用效率分别为468.6 kg/hm^2、252.4万元/hm^2、22.3和0.387 kg/m^3。实际生产中,推荐将喷灌75控水下限作为白茶节水灌溉模式。In order to investigate the effects of different water-saving irrigation modes on the growth and yield of white tea,two irrigation methods(sprinkler irrigation and drip irrigation)and three control lower limits(65%,75%and 85%)of relative water content were designed.The index of fresh&dry weight,leaf area index,100-bud weight and bud color of white tea were observed.At the same time,an entropy weight coefficient evaluation model was constructed,and the indexes of yield,output value,economic feasibility of engineering construction and irrigation water utilization efficiency were considered to select the optimal water saving irrigation scheme.The results showed that the 100 bud weight,leaf area index and dry weight of white tea were the highest under the treatment of sprinkling irrigation with 85%lower limit of water control;Under the same irrigation mode,increasing the lower limit of water control increased the yield of white tea by 2.4%to 17.7%under drip irrigation and 16.7%to 30.2%under sprinkler irrigation.The results of the entropy weight coefficient evaluation model showed that the comprehensive benefit of the treatment of sprinkling irrigation with the lower limit of 75%water control was the best,and the evaluation value of the entropy weight coefficient reached 0.96.Under this irrigation mode,the output value of white tea,the internal rate of return of the national economy and the utilization efficiency of irrigation water for the construction of water-saving irrigation projects were 468.6 kg/hm^2,2.524 million yuan/hm^2,22.3%and 0.387 kg/m^3,respectively.In practice,the sprinkling irrigation with the lower limit of 75%water control is recommended as the water-saving irrigation mode for white tea.

关 键 词：白茶 灌溉 熵权系数 产量 经济效益 

分 类 号：S274.1[农业科学—农业水土工程]