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里下河荡滩面积较大,近年来由于水系发生变化,柴草产量逐年下降,效益很差.如何在这类地区建立良好的生态环境,提高经济效益,营造池杉丰产林,是人们共同关心的问题.从1978年开始,我县采用开沟筑垛的方法,即抬田法在张轩乡白马荡营造池杉丰产林,几年来已取得一定效果,现将试验情况报道如下:试验地概况和试验方法试验地设在白马荡西北角张轩乡林场,北纬32°41′,东经119°30′,年平均温度14.7℃,年降雨量1023毫米,无霜期217天,常年辐射量118千卡/厘米,荡滩原地面真高1.70米,常年水位0.9—1.0米,枯水位0.7米,近年来最大水位2.53米.土壤为腐殖质沼泽土,PH值7.4,有机质含量3.3%,含氮量0.19%,速效磷10.1ppm,速效钾9.9ppm,容重1.28克,总孔隙度51.8%.
In recent years, due to changes in water system, the production of firewood declined year by year, and the benefits are very poor. How to establish a good ecological environment in these areas, enhance economic benefits and create a rich forest of Ipomoea cinnabarinus is a common concern Since 1978, my county adopts the method of ditching and building stacks, that is, the method of lifting the field in Zhang Xuan Xiang Bai Maodong camp to create Ipomoea Pine forests, has achieved some success over the past few years, the test is now reported as follows: Test ground Overview and test methods The test site is located in Zhang Xuanxiang forest farm northwest corner of the White Horse swing north latitude 32 ° 41 ’, longitude 119 ° 30’, the annual average temperature of 14.7 ℃, the annual rainfall of 1023 mm, frost-free period of 217 days, perennial radiation 118 Card / cm, the beach on the original ground 1.70 meters high, perennial water level of 0.9-1.0 meters, 0.7 meters of dry water in recent years, the maximum water level of 2.53 meters. The soil is humus swamp soil, PH value of 7.4, 3.3% organic matter content, nitrogen content 0.19%, available phosphorus 10.1ppm, available potassium 9.9ppm, bulk density 1.28g, the total porosity of 51.8%.