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以小油菜为试材,用自行分离出的5株解磷细菌制成液体菌剂,进行盆栽试验。结果表明:不论施磷肥与否,使用解磷细菌可以提高小油菜的产量,其中溶磷菌w12-7和解磷菌y9-4处理的小油菜的产量提高的最多,其次为溶磷菌w5-2处理的小油菜;作物收获后,土壤速效磷含量变化较大,不施磷肥时,使用溶磷菌w12-7和解磷菌y9-4的土壤速效磷含量降低较少,分别比对照变化值少23.4%和34.8%;施磷肥后,所有处理的速效磷含量均有所增加,且溶磷菌w5-2和解磷菌y9-4处理增加较多。解磷细菌对土壤pH和全磷含量影响不明显;溶磷菌w12-7、w5-2和解磷菌y9-4较适用于青海省石灰性土壤中。
Taking rapeseed as test material, five strains of phosphate-solubilizing bacteria isolated from their own were used to make liquid bacterioplankton for pot experiment. The results showed that the use of phosphate-solubilizing bacteria could increase the yield of rapeseed, regardless of the application of phosphate fertilizer. The yield of rapeseed w12-7 and solution-solubilizing bacteria y9-4 increased most, followed by that of phosphate-solubilizing bacteria w5- 2 treatment rapeseed; after harvest, soil available phosphorus content changes are large, without phosphate, the use of phosphate-solubilizing bacteria w12-7 and phosphate-solubilizing bacteria y9-4 soil less available phosphorus decreased, respectively, compared with the control value Less 23.4% and 34.8% respectively. After applying phosphate fertilizer, the contents of available phosphorus in all treatments increased, and the phosphate solubilizing bacteria w5-2 and phosphate solubilizing bacteria y9-4 increased more. Phosphate solubilizing bacteria had no significant effect on soil pH and total phosphorus content. Phosphorus solubilizing bacteria w12-7, w5-2 and phosphate solubilizing bacteria y9-4 were more suitable for calcareous soil in Qinghai Province.