3种作物对盐碱性防护林地改良效果分析

Analysis on the Improvement Effect in the Saline Protection Forest Land by Three Kinds of Crops

通过盐碱性防护林地播种大麦、小麦和大豆的试验,结果显示:夏季高温干旱期间,实施播种大豆的防护林地土表层(0～20 cm)的可溶性盐分和pH值分别为0.65 g/kg和7.04,与实施播种大麦和小麦无明显差异,有机质(29.88 g/kg)、速磷(91.10 mg/kg)、速钾(23.10 mg/kg)和速氮(134/43 mg/kg)则分别比实施播种大麦和小麦有明显增高,并且存在极显著差异。3种作物播种后,防护林地没有出现"返盐碱"(发白)现象,表明实施播种大豆对改善林地土壤条件的效果最好,其次是播种大麦和小麦。

It is conducted the experiments sowing the barley, wheat and soybean in the saline protection forest land. The results show that during high temperature and drought period in summer, the soluble salt and pH value of surface layer （ 0 - 20 cm ） at the protection forest land sowed with soybean were 0.65 g/kg and 7.04 respectively, without significant difference compared with the land sowed with the barley and wheat. While the content of organic matter （29.88g/kg）, P （91.10 mg./kg）, fast potassium （23.10 mg/kg） and rate of nitrogen （134.43 mg./kg） of the land sowed with soybean is much higher than that of barley and wheat with the significant difference. After the sowing of three kinds of crops, the protection forest land did not appear the return saline （ white）, that means sowing of soybean has the best effect in the improvement of soil conditions in the protection forest land and the barley and wheat next.