长期不同施肥措施对黄壤微生物量碳及氮的影响

发布时间：2018-08-26 13:39

【摘要】：为黄壤旱地合理施肥与养分综合管理提供依据,实现黄壤旱地可持续利用,以选择贵州黄壤肥力与肥料长期定位试验中不施肥(CK)、常量有机肥(M)、常量有机肥+常量氮磷钾肥(MNPK)和常量氮磷钾肥(NPK)4个处理,分析贵州黄壤长期定位施肥18年后的旱地土壤微生物量C和微生物量N。结果表明:长期施肥对土壤中的微生物量C和N均有增加作用,并且影响趋势一致,含量依次为M+NPKMNPKCK。与CK相比,各施肥处理均提高了微生物对有机碳、全氮的利用率,其中全氮的利用率提高最明显,M+NPK处理中土壤微生物对氮利用率最高,约为CK的5倍,其次是M处理,为CK的4.37倍。各处理有机碳利用率与CK差异较小,其中M处理土壤微生物对有机碳利用率最高,其次为M+NPK处理。
[Abstract]:It provides the basis for rational fertilization and integrated nutrient management in yellow soil upland, and realizes the sustainable utilization of yellow soil upland. Four treatments of (CK), constant organic fertilizer (M), constant N P K fertilizer (MNPK) and constant N P K fertilizer (NPK) were selected in the experiment of soil fertility and fertilizer location in Guizhou Province for a long period of time. The results showed that there were four treatments in this experiment: no (CK), constant organic fertilizer (M), constant N P K fertilizer (MNPK) and constant N P K fertilizer (NPK). The microbial biomass C and N of upland soil after 18 years of long-term fertilization in yellow soil of Guizhou Province were analyzed. The results showed that long-term fertilization had an increasing effect on microbial biomass C and N in soil, and the effect trend was the same, and the order of content was M NPKMNPKCK.. Compared with CK, all fertilization treatments increased the utilization efficiency of organic carbon and total nitrogen. The soil microbial utilization efficiency of M NPK treatment was the highest, about 5 times of that of CK, followed by M treatment. It is 4.37 times of CK. There was little difference between the organic carbon utilization efficiency of each treatment and that of CK, in which the soil microorganism of M treatment had the highest organic carbon utilization efficiency, followed by M NPK treatment.
【作者单位】：贵州省土壤肥料研究所;贵州大学;贵州省农业资源与环境工程技术研究中心;农业部贵州耕地保育与农业环境科学观测实验站;
【基金】：贵州省院联合基金[黔科合LH字(2014)7708] 贵州省农科院院专项[黔农科院院专项(2013)010];贵州省农科院自主创新专项[黔农科院自主创新专项(2014)007] 院地合作项目[院地农科合字(2015)10]
【分类号】：S154.3

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