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为了探讨农田林网对水稻的防护效益,1981年9—10月我们在丰县沙庄公社张黄庄大队2号稻田设点观测,现将初步结果整理如下:一、林网概况沙庄公社,位于复新河下游,属于河灌区,土质粘重,保水性能好,历年种植水稻.1969年以来,营造了大量的杂交柳、旱柳、杨树,张黄庄大队基本上实现了农田林网化.观测的林网网格东西长383米,南北宽249米,计143亩.网格内种植水稻105亩,种植绿豆38亩.南北两条林带由二行杂交柳组成,平均高7米,平均胸径6厘米,林龄6年,株行距1×1米,旁有小沟、农渠、渠顶、沟坡伴生着小柳树.东林带在大沟旁,由一行旱柳组成,平均高12米,平均胸径33厘米,株距4米,间有稀疏的小杨树.西林带由二行杂交柳组
In order to explore the protective effect of farmland forest net on rice, from September to October 1981, we set up a site in No.2 paddy field of Zhanghuangzhuang Bldg., Shazhuang commune, Fengxian County. The preliminary results are summarized as follows: I. Overview of the forest network Shazhuang commune, Located in the lower reaches of Fuxin River, belong to the river irrigation area, soil sticky, water retention performance, over the years to grow rice .Since 1969, to create a large number of hybrid willow, willow, poplar, Zhanghuangzhuang brigade basically realized farmland The forest network grid observed 383 meters long east-west, 249 meters wide north-south, accounting for 143 acres of grid planting 105 acres of rice, planting mung bean 38 acres of north-south two forest by two rows of willow composition, an average of 7 meters high , Average diameter 6 cm, age 6 years, plant spacing 1 × 1 m, next to a small ditch, agricultural drains, drains, gully accompanied by small willow trees .East forest belt in the ditch, by a row of willow, the average 12 meters high, the average diameter at chest diameter 33 cm, spacing 4 meters, between the sparse poplar.