本文選題：地帶性土壤　切入點(diǎn)：無機(jī)氮　出處：《應(yīng)用生態(tài)學(xué)報(bào)》2016年03期 　論文類型：期刊論文

【摘要】：在野外取樣的基礎(chǔ)上,研究中國不同典型地帶性土壤各形態(tài)氮素分布特征及其影響因素.結(jié)果表明:垂直地帶性土壤中0.5 mol·L~(-1)K_2SO_4提取的提取態(tài)總氮、提取態(tài)有機(jī)氮、吸附氨基酸隨取樣點(diǎn)海拔的增加而顯著增加,且提取態(tài)總氮、提取態(tài)有機(jī)氮和吸附氨基酸平均值都大于水平地帶性土壤;水平地帶性土壤各形態(tài)氮含量隨土壤類型的不同而差異顯著.土壤吸附氨基酸含量是游離氨基酸的5倍,占提取態(tài)有機(jī)氮百分比為21.1%,表明吸附氨基酸可能作為土壤有機(jī)氮庫的一種重要存在形態(tài).相關(guān)分析結(jié)果表明,垂直地帶性土壤中提取態(tài)總氮、提取態(tài)有機(jī)氮、銨態(tài)氮、氨基酸態(tài)氮均與有機(jī)質(zhì)、全氮呈顯著正相關(guān)(r=0.57~0.93,P0.05),但與pH、硝態(tài)氮呈顯著負(fù)相關(guān)(r=-0.37~-0.91,P0.05);水平地帶性土壤pH與提取態(tài)總氮、硝態(tài)氮、有機(jī)質(zhì)、全氮、堿解氮及鹽基離子(K~+、Ca~(2+)、Mg~(2+))呈顯著正相關(guān)(r=0.36~0.85,P0.05),與銨態(tài)氮、氨基酸態(tài)氮呈顯著負(fù)相關(guān)(r=-0.39~-0.81,P0.05).
[Abstract]:On the basis of field sampling, the distribution characteristics of nitrogen in different typical zonal soils in China and their influencing factors were studied. The results showed that the extracted total nitrogen and organic nitrogen were extracted from 0.5 mol 路L ~ (-1) K _ 2SO _ 4 in vertical zonal soils. The adsorption amino acids increased significantly with the increase of sampling altitude, and the average values of extracted total nitrogen, extracted organic nitrogen and adsorbed amino acids were higher than those of horizontal zonal soils. The nitrogen contents of different forms of soil in horizontal zonal soils varied significantly with different soil types, and the content of adsorbed amino acids in soils was 5 times as much as that of free amino acids. The percentage of extracted organic nitrogen was 21. 1, indicating that the adsorbed amino acids might be an important form of soil organic nitrogen pool. The correlation analysis showed that the extracted total nitrogen, extracted organic nitrogen and ammonium nitrogen in vertical zonal soil were extracted. Amino acid nitrogen was positively correlated with organic matter, total nitrogen was positively correlated with total nitrogen, but negatively correlated with pH and nitrate nitrogen, and was negatively correlated with pH and nitrate nitrogen, and was negatively correlated with total nitrogen, nitrate nitrogen, organic matter, total nitrogen, total nitrogen, total nitrogen, total nitrogen, total nitrogen, total nitrogen, organic matter, total nitrogen, total nitrogen, total nitrogen, total nitrogen, total nitrogen, total nitrogen, total nitrogen, total nitrogen, total nitrogen, total nitrogen, total nitrogen, total nitrogen, total nitrogen, total organic matter and total nitrogen. There was a significant positive correlation between alkali-hydrolyzed nitrogen and salt base ion (K ~ (+)). There was a significant negative correlation with ammonium nitrogen and amino acid nitrogen (r = 0.39 ~ 0. 39 ~ 0. 81 ~ 0. 05 ~ 0. 05 ~ 0. 05 ~ 0. 05 ~ 0. 05 ~ 0. 36 ~ 0. 65 ~ 0. 05 ~ 0. 05 ~ 0. 05 ~ 0. 05 ~ 0. 05 ~ 0. 05 ~ 0. 05).
【作者單位】： 中國水稻研究所/水稻生物學(xué)國家重點(diǎn)實(shí)驗(yàn)室;浙江大學(xué)環(huán)境與資源學(xué)院/教育部環(huán)境修復(fù)與生態(tài)健康重點(diǎn)實(shí)驗(yàn)室;
【基金】：浙江省自然科學(xué)基金項(xiàng)目(LQ15C130004) 國家自然科學(xué)基金項(xiàng)目(31172032,31172032) 國家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃項(xiàng)目(2015CB150502)資助~~
【分類號】：S158

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