Region Planning and Evaluation of Walnut Cultivation Areas in Yunnan Province
This study was conducted aiming to provide some scientific basis for the industrial planning and the planting layout of walnut in Yunnan province.Based on the comprehensive investigation on the cultivation environ-ment,cultivated varieties,yield and quality of walnut of the whole province,taking the basic requirements of walnut to ecological environment,the resource characteristics of walnut varieties in different regions of Yunnan,the related plannings of agriculture and forestry,and the climatic conditions as the fundamental basis,choosing seven climatic factors with key effects on yield and quality of walnut,the expert evaluation index system and the climate data geo-graphic information system analysis model were built,related tables and figures were worked out and the planning results were achieved.The results showed that:(1)The walnut cultivation of Yunnan province could be zoned into six cultivations which include eastern to northeast Yunnan,central Yunnan,northwest Yunnan,western Yunnan,southeast Yunnan,southern marginal zone in first-level zone;(2)Second-level zone(3841.68×104 hm2)include the suitable areas 1334.12×104 hm2(34.7%),sub-suitable areas 1148.26×104 hm2(29.9%),non-planned area 1359.3×104 hm2(35.4%).(3)Optimal areas 170.94×104 hm2(12.8%),the second best areas 920.87×104 hm2(69%),the general suitable areas 242.31×104 hm2(18.2%).Optional cultivation areas 645.42×104 hm2(56.2%)and limited cultivation areas 502.42×104 hm2(43.8%)could be classified under the category of sub-suitable areas;(4)There are differences among six walnut cultivations in selected varieties and plant-label technologies.
万方数据
维普
