本文選題：土壤微生物 + 生物量　； 參考：《南京林業(yè)大學(xué)學(xué)報(bào)(自然科學(xué)版)》2016年05期

【摘要】：以江蘇東臺(tái)林場(chǎng)5年生楊樹人工林為對(duì)象,在2012年6月設(shè)置了不同施肥處理(N、P、K復(fù)合肥,T1;有機(jī)肥,T2;生物炭,T3;N、P、K復(fù)合肥+生物炭,T4;有機(jī)肥+生物炭,T5;對(duì)照,CK),并在2012年8月至2013年6月期間每2個(gè)月1次共進(jìn)行6次重復(fù)土壤取樣,研究了不同施肥模式對(duì)土壤微生物生物量C、N、P(SMBC、SMBN、SMBP)的影響。結(jié)果顯示:15種施肥模式均顯著提高了SMBC和SMBN,但對(duì)SMBP的影響較小,僅T1處理與對(duì)照間達(dá)到顯著性差異;2在0~10 cm土層僅T5處理顯著降低了SMBC與SMBN的比值,在≥10~25 cm土層各處理SMBC與SMBN的比值均未顯著下降,而在≥25~40 cm土層T1、T2、T4和T5處理的SMBC與SMBN的比值均顯著下降,表明不同施肥模式對(duì)土壤N供應(yīng)能力的改善作用隨土層深度的增加而增加。綜合分析表明,T4處理最有利于提高楊樹人工林SMBC、SMBN和SMBP的含量,同時(shí)有利于提高土壤對(duì)植物生長(zhǎng)所需有效N的供給,因此T4處理即N、P、K復(fù)合肥+生物炭可作為該區(qū)域楊樹人工林的最佳施肥模式。
[Abstract]:A 5-year-old poplar plantation in Dongtai Forest Farm, Jiangsu Province, was studied. In June 2012, different fertilization treatments were set up for N, N, P, K compound fertilizer, T1; organic fertilizer, T2; biochar, T4; organic fertilizer, biochar, T5; control, CK, and 6 repeated soil samples were taken every 2 months from August 2012 to June 2013, The effects of different fertilization modes on soil microbial biomass (SMBN, SMBC, SMBP) were studied. The results showed that SMBC and SMBN were significantly increased in all 15 fertilization modes, but had little effect on SMBP. The difference between T1 treatment and control was significant only in 0 ~ 10 cm soil layer, only T5 treatment significantly reduced the ratio of SMBC to SMBN. The ratio of SMBC to SMBN in the soil layer 鈮，

本文編號(hào)：1949488