一株荧光假单胞菌的溶磷特性及其对杨树的促生效果

Abstract

Abstract:

A phosphate-dissolving bacterium, Pseudomonads fluorescent JW-JS1, was selected from the poplar rhizosphere. The phosphate-dissolving characteristics of this isolated strain were studied by using liquid fermentation, and its growth promoting effect on poplar seedlings was conducted in a greenhouse. The results showed that the strain displayed its highest phosphate-dissolving capacity when using glucose as C source, (NH₄)₂SO₄ as N source and C/N as 100:1, and could dissolve phosphate at a rate of 580.72, 708.34 and 608.97 mg·L^-1, respectively; Under the following conditions of temperature 30 ℃, initial pH 7.0, filling amount 1/5 and 0% NaCl concentration, the strain produced the highest phosphate-dissolving capacity, and the phosphate-dissolving rate was as much as 562.89, 594.58, 638.62 and 527.82 mg·L^-1, respectively. The JW-JS1 significantly improved the growth of seedlings of NL-895 and P. deltoides, and could also increased the content of P, K, Ca and Mg in plants. As a result, the seedling height, diameter, fresh weight and dry weight of NL-895 and P. deltoides increased 21.96%, 5.04%, 57.33%, 54.36% and 51.66%, 1.98%, 150.18%, 168.49% than the control group, respectively; The contents of P, K, Ca and Mg in plants increased 25.16%, 19.75%, 17.12%, 10.10% and 27.55%, 125.53%, 55.47%, 102.94% than the control group, respectively.

Key words: poplar, Pseudomonads fluorescent, characteristics, promoting effect

CLC Number:

S718.7

Liu Hui, Wu Xiaoqin, Ren Jiahong, Chen Dan. Phosphate-Dissolving Characteristics and Growth Promoting Effect of Pseudomonads fluorescent JW-JSI on Poplar Seedlings[J]. Scientia Silvae Sinicae, 2013, 49(9): 112-118.

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Phosphate-Dissolving Characteristics and Growth Promoting Effect of Pseudomonads fluorescent JW-JSI on Poplar Seedlings

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