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you ji fei he fu zhi suan lei fei liao dui tu rang tan xun huan ji wen shi xiao ying de ying xiang
Pages: 45-
46
Year: 2009
Issue:
2
Journal: Humic Acid
Abstract: 碳是各种有机化合物主要组成元素,在植物的干重中碳含量为49%左右,居各种植物必需营养元素之首;在植物鲜样中含量为18%,仅次于氧,居第二位.植物所需的碳素主要来源于大气和土壤,而在农业生产中各种作物所需碳素,主要由有机肥和腐植酸类肥料、CO2气肥及施入土壤中各种含碳有机物料供给.
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