二十九团场农艺师范德玉采取设置隔层填沙的办法改良黑盐斑的研究获得成功。 巴州科委鉴定说:这一科研项目在国内外尚未见报道,属于创新项目。在二十九团,黑盐斑地平均占耕地的8％,这些盐斑地在0—30厘米土层中,含盐量达3—6％,耕作层下有淤积层,透水性差,这些盐斑地分布在各农田中,其盐分向周围扩散,严重影响出苗率,对建立稳产高产田是个威胁。一九七八年范德玉和助手龚德声对改良黑盐斑进行了广泛的研究试验工作。在进行多点调查中发现凡是在耕作层下25—70厘米土层中有一 Twenty-nine field agronomist Van der Yu to take a set of sand filling sand barrier method to improve the study of black spots success. Bazhou Science and Technology Commission said: This research project has not been reported at home and abroad, are innovative projects. In Twenty-nine regiments, black salina averaged 8% of arable land. These salinities ranged from 3-6% in 0-30 cm of soil layer. There were sediments beneath the tillage layer and poor water permeability Salts are distributed in various farmland, the salt spread to the surrounding, seriously affecting the emergence rate, the establishment of a stable and high yielding fields is a threat. In 1978, Fan Deyu and assistant Gong Desheng conducted extensive research and experiments on the improvement of black plaque. In a multi-point survey found that usually in the cultivation layer 25-70 cm soil layer