本文選題：喀斯特地區(qū) + 金橘　； 參考：《廣西師范大學(xué)學(xué)報(bào)(自然科學(xué)版)》2017年01期

【摘要】：為合理利用叢枝菌根真菌(arbuscular mycorrhizal fungi,AMF)資源,揭示AM真菌對(duì)金橘根圍土壤酶活性和植株生長影響的機(jī)制,以喀斯特非巖溶區(qū)酸性土(AS)和巖溶區(qū)石灰土(LS)為基質(zhì)進(jìn)行盆栽實(shí)驗(yàn),研究分別接種叢枝菌根真菌AMF的摩西球囊霉(Glomus mosseae,G.m)和幼套球囊霉(Glomus etunicatum,G.e)對(duì)金橘幼苗根圍土壤酶活性的影響。結(jié)果表明:相同類型土壤中分別接種G.m和G.e后,無論何種土壤,G.e處理金橘根圍菌根侵染率各指標(biāo)F、m、v均顯著高于G.m處理(P≤0.05),其中酸性土中接種G.e處理的最高;此外,分別接種G.e和G.m后,金橘根圍土壤蛋白酶、脲酶、磷酸酶和蔗糖酶活性與土壤有機(jī)碳、有機(jī)質(zhì)含量及植株生物量均比其相應(yīng)的不接種對(duì)照顯著增高。蛋白酶和脲酶活性變化趨勢(shì)為:(LS+G.e)(LS+G.m)(AS+G.e)(AS+G.m),蔗糖酶和磷酸酶活性變化則為:(AS+G.e)(AS+G.m)(LS+G.e)(LS+G.m),差異均達(dá)顯著水平(P≤0.05)。G.e處理金橘根系土壤蛋白酶活性增幅最大,脲酶第二,磷酸酶最小。土壤有機(jī)質(zhì)和有機(jī)碳含量變化均有(AS+G.e)(LS+G.e)(LS+G.m)(AS+G.m)的變化趨勢(shì),G.e處理均顯著高于G.m處理(P≤0.05)。不論酸性土或石灰土,金橘干物質(zhì)積累表現(xiàn)為接種G.e處理顯著高于G.m處理,表現(xiàn)出與AM菌根侵染率相似的變化趨勢(shì)�？梢�,AMF可通過增強(qiáng)金橘根圍土壤酶活性,影響土壤中有效養(yǎng)分的轉(zhuǎn)化和土壤肥力,最終促進(jìn)金橘生長。G.e為篩選出的能與喀斯特地區(qū)石灰土和酸性土中生長的金橘共生良好的優(yōu)勢(shì)菌種,具有較好的運(yùn)用潛力以克服喀斯特地區(qū)土壤肥力低而導(dǎo)致的作物收成欠佳的難題。
[Abstract]:In order to make rational use of arbuscular mycorrhizal fungiformis (AMF) resources and to reveal the mechanism of AM fungi affecting soil enzyme activity and plant growth in kumquat root environs, pot experiments were carried out with acid soil ASA and LSs in Karst non-karst area. The effects of Glomus mossea G. m and Glomus etunicatumum G.e on soil enzyme activity in the rhizosphere of kumquat seedlings were studied respectively by inoculating arbuscular mycorrhizal fungus AMF. The results showed that after inoculating G. m and G. e in the same type of soil, the infection rate of rhizomial mycorrhizal infection of kumquat treated with G. e was significantly higher than that of G. m treatment P 鈮，

本文編號(hào)：1900975