水培条件下玉米幼苗利用钾长石作钾源的研究

Stduy on the Usage Potash Feldspar as Potassium Source for Young Corn under Hydroponics Condition

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 possibility of usingage Bacillus Mucilaginosus to release K-feldspar as an available K source of crops,the orthogonal experiments of maize hydroponics culturing are carried out.Single-factor analysis shows that： the suitable bacterial dosage is 2%;there is a positive correlation between K-feldspar bioresolving capability and its dosage;the factors of plant root exudates and oscillation can accelerate the bioresolving of K-feldspar,but the adscititious soluble K has an inhibiting effect.Orthogonal experiments show that the optimal conditions are： B.Mucilaginosus 2%,K-feldspar dosage 0.5 g 100 ml-1,pH 5,and the number of maize seedling 3.All the above can provide a reference for bacteria K fertilizer＇s development.