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我们和南京土壤所协作,先后在陕北、关中等地与工人、贫下中农一起共同开展碳铵粒肥及其肥效的试验。粒肥共分三种:一种是碳铵直接用冲压机和滚压机加压造粒;一种是用表面活性剂通过喷雾搅拌吸附后,冲压造粒;一种暂称过油粒肥,是针对黄土区土壤碳酸钙含量高(7—16%),粒肥分解快的特点,为防止粒肥和土壤直接接触,用筛网把碳铵粒肥快速通过石蜡渣油,使粒肥表面包上一层油膜,这是介于粒肥与长效肥之间的一种粒肥。挥发损失的测定是在不同气温和湿度条件下,暴露在室内空气中进行的。分解速度是埋入土中定期测定。肥效试验是在陕北轻壤质
In collaboration with Nanjing Soil, we worked with workers, poor peasants and middle peasants in northern Shaanxi and Guanzhong to carry out trials of ammonium carbonate fertilizer and its fertilizer efficiency. Particle fertilizer is divided into three types: one is the direct use of ammonium bicarbonate press and roller pressure granulation; one is the surfactant through the spray stirring adsorption, stamping granulation; In view of the characteristics of loess soil calcium carbonate content is high (7-16%), granule decomposition fast, in order to prevent the granulation and soil direct contact with the sieve to the ammonium carbonate fertilizer quickly through the paraffin residue oil, granulation fertilizer coated with a layer of film , Which is between a granule fertilizer and a long-term fertilizer between a granular fertilizer. Volatile loss is measured under different temperatures and humidity conditions, exposure to indoor air carried out. Decomposition rate is buried in the soil regularly measured. Fertilizer efficiency test is light loam in northern Shaanxi