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农田林网是保护农作物的屏障,但随着林网树木的生长,树木胁地问题也明显地表现出来。为了弄清林网胁地问题和林网内增产的效果。我们对全县50万亩不同类型的农田林网进行了观察和定点试验,初步摸清了农田林网对秋作物增产的作用。一、农田林网树木配置形式对胁地的影响排、灌、路、林四配套的林网,树木配置形式直接影响对农田的防护作用及胁地的多少。为摸清既胁地少又发挥防护效益的配置形式,我们调查了6种不同形式的林网配
Farmland forest network is to protect the crops barrier, but with the growth of forest network trees, tree threat to the ground is also evident. In order to clarify the threat to the forest network and forest net effect of increased production. We observed and fixed-point the experiment of 500,000 mu of different types of farmland forest net in the whole county and found out the effect of farmland forest net on the yield increase of autumn crops. First, the farmland forest net tree configuration form of the impact of the platoon, irrigation, road, forest four supporting forest network, the tree configuration directly affects the protective effect of farmland and threatening the number. In order to find out the less threatening and protective forms of protection, we investigated 6 different forms of forest net