本文選題：土壤質(zhì)量 + 綜合評(píng)價(jià)��； 參考：《中國(guó)水土保持科學(xué)》2017年03期

【摘要】：為探明不同樹(shù)種配置對(duì)杉木純林改造中土壤質(zhì)量的影響,以南亞熱帶地區(qū)不同樹(shù)種配置、林齡11~12 a的杉闊混交林為研究對(duì)象,以林齡13 a杉木純林的土壤化學(xué)性質(zhì)為對(duì)照,比較不同林分0~25 cm土層的土壤理化性質(zhì)以及微生物生物量碳和氮,并基于主成分分析,綜合評(píng)價(jià)不同杉闊混交林的土壤質(zhì)量。結(jié)果表明:混交林土壤p H值為4.15~4.71,速效氮和速效磷質(zhì)量分?jǐn)?shù)分別為81.4~152.8和0.93~2.39 mg/kg,杉木林p H值為4.06,速效氮和速效磷質(zhì)量分?jǐn)?shù)分別為30.8和0.76 mg/kg,前者比后者有不同程度的升高;全磷質(zhì)量分?jǐn)?shù)除林分C(0.45g/kg)較高外,其余混交林(0.14~0.32 g/kg)均小于杉木林(0.34 g/kg);其他指標(biāo)在不同林分間無(wú)一致變化規(guī)律。杉闊混交林的土壤質(zhì)量指數(shù)介于0.25~0.64之間;其中,米老排+楓香+香樟+盆架子+杉木、米老排+香樟+陰香+火力楠+杉木、米老排+楓香+香樟+尖葉杜英+杉木3種樹(shù)種配置的土壤質(zhì)量指數(shù)均大于0.6,表現(xiàn)出較強(qiáng)的土壤改良能力;米老排和香樟樹(shù)種的土壤改良能力較強(qiáng),而海南蒲桃和大葉紫薇較差。3種土壤質(zhì)量指數(shù)較大的樹(shù)種配置,可在我國(guó)南亞熱帶地區(qū)的杉木純林改造中推廣應(yīng)用。
[Abstract]:In order to investigate the effect of different tree species allocation on soil quality of pure Chinese fir forest, the soil chemical properties of pure Chinese fir forest at 13 years old were studied by using different tree species allocation and 1112 years old fir and broad-leaved mixed forest in the subtropical region as the research object, and the soil chemical properties of the pure Chinese fir forest at the age of 13 years were compared. The soil physical and chemical properties, microbial biomass carbon and nitrogen of different stands were compared. Based on principal component analysis, the soil quality of different fir and broad-leaved mixed forest was evaluated. The results showed that the soil pH value of mixed forest was 4.15 ~ 4.71, the mass fraction of available nitrogen and available phosphorus were 81.4 ~ 152.8 and 0.93N ~ (2.39) mg / kg respectively, the pH value of Chinese fir forest was 4.06, the mass fraction of available nitrogen and available phosphorus were 30.8 and 0.76 mg / kg respectively, the former was higher than the latter to some extent. The total phosphorus content was 0.34 g / kg lower than that in the Chinese fir forest, except that the content of total phosphorus was 0.45 g / kg in the stands, and there was no consistent change of other indexes among the different stands in the other mixed forest stands (0.14 ~ 0.32 g 路kg ~ (-1 / kg), and the total phosphorus content was 0.34 g / kg ~ (-1) in the Chinese fir forest. The soil quality index of Chinese fir and broad-leaved mixed forest was between 0.25 and 0.64. Among them, the old row of rice, maple and camphor stand of Chinese fir, and the old row of rice of Chinese fir, The soil quality index of the three tree species were all greater than 0.6, which showed strong ability of soil improvement, and the soil quality index of Laopai and camphor trees was stronger than that of Chinese fir tree, and the soil quality index of the three tree species was higher than 0.6, and the soil quality index of the three tree species was higher than 0.6. However, the tree species with lower soil quality index and lower soil quality index could be widely used in the transformation of pure Chinese fir forest in the subtropical region of China.
【作者單位】： 廣東省森林培育與保護(hù)利用重點(diǎn)實(shí)驗(yàn)室廣東省林業(yè)科學(xué)研究院;廣東省佛山市云勇生態(tài)林養(yǎng)護(hù)中心;
【基金】：廣東省林業(yè)科技創(chuàng)新專項(xiàng)項(xiàng)目“廣東省典型區(qū)域碳匯林結(jié)構(gòu)優(yōu)化關(guān)鍵技術(shù)研究與示范”(2015KJCX027);廣東省林業(yè)科技創(chuàng)新專項(xiàng)項(xiàng)目“新豐江飲用水源地水源林構(gòu)建關(guān)鍵技術(shù)研究與示范”(2015KJCX029)
【分類號(hào)】：S714

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