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一、从自然堆制物(土硫磺、磷矿粉、草粉等)中分离到一株氧化硫硫杆菌,在一般条件下,能利用硫磺产生6%左右的硫酸;研究了硫磺用量、质量、细度以及氧化时间对产生硫酸的影响;在振荡条件下,31℃培养5—7天,每毫升培养液菌数能达1—5亿个。二、实验室摇瓶试验结果证明,氧化硫硫杆菌对摩洛哥和徂徕两种磷矿粉均有解磷能力。当磷矿粉量为1—2%时,基本上可以全部溶解出来,但随着磷矿粉量的增加溶磷率递减,在一定范围内,解磷能力和产酸能力有正比关系。三、利用氧化硫硫杆菌与硫磺、磷矿粉、硫酸铵、麦糠或碎秸秆等按一定比例混合制成堆肥,是使磷矿粉有效化的重要途径之一,适于农村使用。经过盆栽(砂培、土培)和田间试验证明:对山东宁阳黑土、泰安县省庄黑土,有降低土壤pH,提高土壤速效磷含量的作用,能够促进玉米的生长发育并有显著的增产效果,对冬前小麦的生长发育也表现有明显的作用。
First, isolated from a natural pile of objects (soil sulfur, rock phosphate, meal, etc.) isolated a strain of sulfur dioxide, under normal conditions, the use of sulfur can produce about 6% sulfuric acid; sulfur consumption, quality , Fineness and oxidation time on the production of sulfuric acid; under shaking conditions, cultured at 31 ℃ 5-7 days, the number of bacteria per ml of culture can reach 1-5 million. Second, the laboratory shake flask test results prove that Thiobacillus thiooxidans on both Moroccan and 徂 Lai both phosphate rock phosphate solution capacity. When the amount of phosphate rock is 1-2%, it can be basically dissolved completely, but with the increase of phosphate rock, the rate of dissolved phosphorus decreases. In a certain range, there is a direct relation between the ability of solution and acid production. Third, the use of sulfur dioxide, sulfur and sulfur, phosphate rock, ammonium sulfate, wheat bran or broken straw mixed into a certain percentage made of compost is one of the important ways to make effective phosphate rock, suitable for rural use. The results of pot experiment (sand culture, soil culture) and field experiment showed that the effect of reducing soil pH and improving soil available phosphorus could promote the growth and development of maize and increase yield significantly Effect, the growth and development of winter wheat also showed a significant role.