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对国家缓控释肥工程技术研究中心分离保藏的1株高效溶磷真菌PFK的耐盐碱性能及溶磷性能进行研究,并进行盐碱土盆栽试验,研究其在盐碱土中对小麦的促生作用。结果表明,PFK菌株具有很强的降解无机磷能力,在以Ca3(PO4)2为唯一磷源的无机磷培养基中培养7 d时,水溶磷含量达到892.86 mg/L,为对照组的89.60倍;pH值≤9的条件对PFK菌株降解无机磷的能力影响不大;PFK菌株在含10%NaCl的PDA培养基中仍可生长。盆栽试验结果表明:接种解磷真菌PFK的处理组小麦的茎粗、株高、根长、鲜干质量显著高于对照组,因而推断PFK菌株具有一定的促生作用。
The salt-tolerance and phosphate-solubilizing properties of one soluble phosphorus-solubilizing fungi PFK isolated and deposited by the National Center for Controlled-Release Fertilizers Engineering Technology were studied, and saline-alkali soil pot experiments were carried out to study the effects of salt- effect. The results showed that PFK strain had a strong capability of degrading inorganic phosphorus. When cultured in inorganic phosphorus medium containing Ca3 (PO4) 2 as sole phosphorus source for 7 days, the water-soluble phosphorus content reached 892.86 mg / L, which was 89.60 The pH value ≤9 had little effect on the ability of PFK to degrade inorganic phosphorus. PFK strain could still grow in PDA medium containing 10% NaCl. The results of pot experiment showed that the PFK strain inoculated with PFK had significantly higher stem diameter, plant height, root length and fresh weight than the control group. Therefore, it was concluded that PFK strain had certain promoting effect.