用小径杨树直接营建农田林网李善湘平原农田林网绿化最大的困难就是植苗后难以管护，保存率低，往往都是春季成活率较高，经过夏秋冬三季后，由于人为的损坏和牲畜啃皮，到翌年春树木已所剩无几，造成“年年栽树不见树”的恶性循环。为解决这一难题，山东省临沂市芝麻墩乡... Poplar directly with the construction of small farm poplar forest network Li Shan Xiang Plain farmland forest green network is the biggest difficulty in the management after planting is difficult to maintain, low preservation rate, are often higher in the spring survival rate, after three seasons summer and fall winter, due to human damage and livestock Barking, to the following year the trees have been depleted, resulting in a “vicious cycle of tree planting every year”. To solve this problem, Linyi City, Shandong Province Sima Dun Township ...