双接种对大豆利用不同有机磷源的影响

以有机磷为磷源,采用盆栽试验研究了接种根瘤菌、丛枝菌根真菌(AMF)和双接种对大豆吸收磷的影响。结果表明,不同磷肥处理植株干物重分别比对照增加了9.40%、7.28%和5.84%;双接种和单接种AMF真菌,大豆单个根瘤鲜重和单个根瘤干重显著增加;双接种比单接种真菌,大豆菌根侵染率显著提高。与相应的不接种对照相比,植酸钠和卵磷脂双接种处理植株吸磷量分别比对照增加了34.96%和33.78%,表明有机磷源双接种可显著提高植株有机磷的利用能力。菌根真菌和固氮微生物双接种对促进作物生长有重要意义。

Effect of inoculating arbuscular mycorrhizal fungi and rhizobium on soybean by utilizating organic phosphorus source

Organic P was used as phosphorus resource. A pot experiment was carried out to investigate the effect of inoculating arbuscular mycorrhizal fungi and rhizobium on phosphorus uptake by soybean under different P source supplies. Comparing with the control, different phosphorus sources greatly promoted the plants growth, plants dry weight was improved by 9.40%, 7.28% and 5.84%, respectively. The results showed that single nodule fresh weight and dry weight both increased due to inoculating AMF and dual inoculation, and the mycorrhizal colonization of dual inoculating soybean was higher than that of AMF inocuating soybean. Comparing with the corresponding non-inoculated control, the P uptaking of Phytate and Lecithin dual inoculation treatment plant was increased 33.78% and 34.96% respectively, dual innoculating rhizobium and mycorrhizal could significantly enhance the phosphorus absorbtion rate of soybean in different P source supplies. Therefore, the results approved that arbuscular mycorrhizal fungi and nitrogen-fixing microoganisms played important roles in facilitating the plants growth.