Effect of biochar on soybean rhizosphere microbes from brown earth soil | ╃妫澹ゅぇ璞归寰╃褰卞

Chinese. 涓轰璁ㄧ╃妫澹ゅぇ璞归寰╃兢浣褰卞锛璇楠璁剧疆CK(0kg.hm-2)锛C1(750kg.hm-2)锛C2(1500kg.hm-2)锛C3(3000kg. hm-2)锛C4(6000kg.hm-2) 5 涓╃搴ㄥぇ璞寮辨缁榧绮娴瀹澹ゅ井╂伴pH 煎伴存姘撮ㄦ锛骞惰瀵寰╁ㄧ涓绮涓甯点缁琛ㄦ澶扮叉╃楂澶ц归澹や腑缁伴楂澧94.9%锛4 涓叉锛涓CK 告剧嚎伴锛13.6 47.2%锛浣C4 澧0.51 锛剧嚎楂2.09%缁姣渚楂锛C4 姣CK楂70.7%澹pH楂锛C4 姣CK楂5.6%涓井╂伴浜绮杩澧澹ょ涓伴渚锛浠ュ楂pH锛╃芥涓虹瑙ｅぇ璞杩浣纰澹ゆ硅

English. To investigate the impact of biochar on soybean rhizosphere population, five biochar application rates were applied in soybean field and samples were collected on seedling stage, blooming stage, bearing pod stage, seed filling stage and mature stage. Dynamic variation of bacteria, fungi and actinomycetes population, soil pH and water holding capacity were studied. Meanwhile, allocation of microbes in biochar particle and soil particle was observed. Results indicated that in most stages,biochar improved rhizosphere bacteria population with 94.9% mostly. Fungi and actinomycetes number decreased in former four stages, with 13.6 fold and 47.2% respectively. However, to mature stage, fungi number increased 0.51 fold and actinomycetes increased 2.09%. Bacteria and fungi ratio increased mostly 70.7% on mature stage. pH went up with 5.6% for C4 relative to CK on mature stage. Compared with soil particles, more microbes in biochar particles were not observed. Through improving bacteria and fungi ratio and pH, biochar is expected to act as soil amendment on alleviating obstacles led by soybean continuous cropping.