陳山紅心杉根際土壤有機碳、氮含量及根際效應
[Abstract]:(Cunninghania lanceolata) is a unique tree species in Jiangxi province and is protected by national geographical indications. At present, there are few researches on the relationship between plant and soil. The effects of organic carbon, nitrogen content and rhizosphere effect on the rhizosphere and non-rhizosphere soil of Pinus chenshanensis were studied in different forest ages (5 ~ 10 ~ 10 ~ 20 and 40 years). The results showed that the pH of rhizosphere was slightly smaller than that of non-rhizosphere, and that of organic carbon and nitrogen was higher than that of non-rhizosphere. With the increase of forest age, the content of organic carbon and nitrogen in rhizosphere and non-rhizosphere soil decreased first and then increased, the rhizosphere effect of organic carbon, total nitrogen and organic nitrogen increased first and then decreased. The rhizosphere effect of nitrate nitrogen and inorganic nitrogen decreased first and then tended to flatten the changes of pH and alkali-hydrolyzed nitrogen. The effects of nitrogen content on pH and organic carbon in rhizosphere and non-rhizosphere soil were total nitrogen inorganic nitrogen alkali-hydrolyzed nitrogen and total nitrogen had the greatest effect on pH and organic carbon rhizosphere effect respectively. With the increase of forest age, the proportion of nitrate nitrogen is higher than that of ammonium nitrogen, so we should pay attention to the loss of nitrogen caused by denitrification and the decrease of soil nutrients in forestland, and should pay attention to the supplement of organic matter and nitrogen in forestland before and after 10 years, in order to prevent soil fertility from declining.
【作者單位】: 中國林業(yè)科學研究院森林生態(tài)環(huán)境與保護研究所國家林業(yè)局森林生態(tài)環(huán)境重點實驗室;江西農(nóng)業(yè)大學林學院江西省森林培育重點實驗室;江西特色林木資源培育與利用2011協(xié)同創(chuàng)新中心;江西省林業(yè)科學院;
【基金】:國家“十三五”重點研發(fā)計劃項目(2016YFD0600303-01) 江西省林業(yè)科技創(chuàng)新項目(201404) 國家自然科學基金項目(31560204)資助
【分類號】:S714
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