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为研究利用细菌分解钾长石作为植物钾源的可行性,进行了玉米水培正交实验。单因素分析表明:培养体系内钾细菌投量并非越多越好,以2%较合适;钾长石粉投量与解钾量正相关;植物根系分泌物和振荡对细菌解钾促进作用明显;而外加可溶钾源对细菌解钾有抑制作用。对细菌、钾长石投量、pH和玉米苗数四因素正交分析表明:细菌解钾最优条件为细菌投量2%,钾长石粉为5 g L-1,pH=5,玉米为3棵,从而为细菌钾肥的开发提供参考。
In order to study the feasibility of bacterial decomposition of potash feldspar as potassium source in plants, orthogonal experiment of hydroponics was conducted. Univariate analysis showed that the amount of potassium bacteria in the culture system was not as good as the 2%, and the 2% was more appropriate. The dosage of potassium feldspar was positively correlated with the amount of potassium released. The effects of plant root exudates and oscillations on the potassium dissolution were obvious. The addition of soluble potassium source of potassium on the bacterial inhibition. Orthogonal analysis of bacteria, potassium feldspar dosage, pH and corn seedling number showed that the optimal conditions for bacterial potassium release were 2% bacterial dosage, 5 g L-1 potassium potassium feldspar, pH = 5, corn 3, so as to provide a reference for the development of bacterial potash.