不同气候与施肥条件下农田土壤微生物生物量特征与容量分析
发布时间：2018-10-22 13:30
【摘要】：【目的】土壤微生物生物量是土壤生物肥力的重要指标,是土壤养分重要的周转库。探讨不同气候和施肥条件下土壤微生物生物量(生物量碳、氮)的特征及容量,对于深刻认识土壤微生物生物量的影响因素及提高土壤生物肥力具有重要意义。【方法】本研究从中国知网、万方和web of Science 3个文献数据库,以"土壤微生物生物量"、"中国农田"和"长期施肥"为关键词,共收集目标文献42篇,包括458组含土壤有机碳(SOC)与土壤微生物生物量碳(SMBC)和414组含土壤全氮(TN)与土壤微生物生物量氮(SMBN)的数据集,涵盖了4种气候下的2类施肥条件(施有机肥:单施或配施,+OM;不施有机肥:无肥和化肥,-OM)。土壤微生物熵(SMBC/SOC)和SMBN/TN的中值差异性均采用Kruskal-Wallis H单向显著性检验(P0.05),容量分析采用界限分析方法。【结果】统计分析结果表明,不同施肥处理下,SMBC与SOC和SMBN与TN之间均存在显著线性正相关关系(P0.01),长期施用有机肥条件下,土壤微生物生物量碳、氮对土壤有机碳和全氮增加的响应系数分别为24.77和30.27,显著高于化肥或不施肥条件(分别为19.88和19.86)(P0.05)。界限分析结果显示,不同施肥措施下SMBC对SOC增加响应的最大值为33.45—36.00,SMBN对TN的最大响应系数为45.45—49.79,当前条件下SMBC和SMBN还有37.99%和49.66%的提升空间。不同气候条件下SMBC/SOC和SMBN/TN均存在显著差异(P0.05),其中,中温带半干旱半湿润区SMBC/SOC的中值最高为2.73%,其次为亚热带湿润区(2.45%)和暖温带湿润区(2.31%),中温带湿润区最低为1.48%;SMBN/TN的中值大小顺序为:暖温带湿润区(4.72%)中温带半干旱半湿润区(3.50%)亚热带湿润区(2.99%)中温带湿润区(1.80%)。不同施肥条件下SMBC/SOC和SMBN/TN的变化范围分别为0.35%—6.50%和0.50%—9.72%,但其中值并无显著差异(P0.05)。对于同一气候条件不同施肥措施而言,仅在中温带湿润区,施有机肥处理对微生物量碳(氮)占总有机碳(氮)的比例有显著影响(P0.05)。【结论】气候对土壤微生物生物量碳、氮所占比例具有显著影响,不同施肥模式虽然不能显著改变微生物生物量碳、氮的比例,但有机肥的施用对微生物生物量碳、氮的提升效果显著高于化肥或不施肥,该结果对于土壤生物肥力的调控有重要指导意义。
[Abstract]:Objective: soil microbial biomass is an important index of soil biological fertility and an important turnover pool of soil nutrients. The characteristics and capacity of soil microbial biomass (biomass carbon, nitrogen) under different climate and fertilization conditions were studied. It is of great significance to deeply understand the influencing factors of soil microbial biomass and to improve soil biological fertility. [methods] this study is based on the three literature databases of China, Wanfang and web of Science. Taking "soil microbial biomass", "Chinese farmland" and "long-term fertilization" as keywords, 42 articles were collected. There were 458 groups of soil organic carbon (SOC) and soil microbial biomass carbon (SMBC) and 414 groups of soil total nitrogen (TN) and soil microbial biomass nitrogen (SMBN) data sets. It covers two types of fertilization conditions under four climates (organic fertilizer: single or combined, OM; no organic fertilizer: no fertilizer and fertilizer,-OM).) The median differences of soil microbial entropy (SMBC/SOC) and SMBN/TN were tested by Kruskal-Wallis H one-way significance test (P0.05), and the capacity analysis was carried out by the method of boundary analysis. [results] the statistical analysis results showed that, Under different fertilization treatments, there was a significant linear positive correlation between SMBC and SOC and between SMBN and TN (P0.01). The response coefficients of nitrogen to soil organic carbon and total nitrogen were 24.77 and 30.27, respectively, which were significantly higher than those of fertilizer or no fertilizer (19.88 and 19.86 respectively) (P0.05). The results of limit analysis showed that the maximum response of SMBC to SOC under different fertilization measures was 33.45-36.00 and the maximum response coefficient to TN was 45.45-49.79, and SMBC and SMBN still had 37.99% and 49.66% lifting space under current conditions. There were significant differences between SMBC/SOC and SMBN/TN in different climatic conditions (P0.05). The median value of SMBC/SOC in the semi-arid and semi-humid zone of the middle temperate zone was the highest (2.73%), followed by the sub-tropical humid zone (2.45%) and the warm temperate zone (2.31%). The order of median value of the median value of SMBC/SOC was 1.48% (4.72%) in the warm temperate zone (4.72%) and the lowest in the middle temperate zone (2.31%). The wetted zone in the middle temperate zone (1.80%) was wetted in the subtropical zone (2.99%) and in the moist region (3.50%). The range of SMBC/SOC and SMBN/TN under different fertilization conditions were 0.35-6.50% and 0.50-9.72%, respectively, but there was no significant difference between them (P0.05). For different fertilization measures under the same climatic conditions, organic fertilizer treatment had a significant effect on the proportion of microbial biomass carbon (nitrogen) to total organic carbon (P 0.05) only in the middle temperate humid zone (P0.05). [conclusion] Climate affects soil microbial biomass carbon. Although the proportion of microbial biomass carbon and nitrogen could not be significantly changed by different fertilization modes, the effect of organic fertilizer application on microbial biomass carbon and nitrogen was significantly higher than that on fertilizer or no fertilizer. The results are of great significance for the regulation of soil biological fertility.
【作者单位】： 中国农业科学院农业资源与农业区划研究所/耕地培育技术国家工程实验室;武汉理工大学;
【基金】：国家“十二五”国家科技支撑计划项目(2014BAD14B02,2014BAD14B03) 国家公益性行业(农业)科研专项(201203030,201303126)
【分类号】：S154.3
本文编号：2287290
[Abstract]:Objective: soil microbial biomass is an important index of soil biological fertility and an important turnover pool of soil nutrients. The characteristics and capacity of soil microbial biomass (biomass carbon, nitrogen) under different climate and fertilization conditions were studied. It is of great significance to deeply understand the influencing factors of soil microbial biomass and to improve soil biological fertility. [methods] this study is based on the three literature databases of China, Wanfang and web of Science. Taking "soil microbial biomass", "Chinese farmland" and "long-term fertilization" as keywords, 42 articles were collected. There were 458 groups of soil organic carbon (SOC) and soil microbial biomass carbon (SMBC) and 414 groups of soil total nitrogen (TN) and soil microbial biomass nitrogen (SMBN) data sets. It covers two types of fertilization conditions under four climates (organic fertilizer: single or combined, OM; no organic fertilizer: no fertilizer and fertilizer,-OM).) The median differences of soil microbial entropy (SMBC/SOC) and SMBN/TN were tested by Kruskal-Wallis H one-way significance test (P0.05), and the capacity analysis was carried out by the method of boundary analysis. [results] the statistical analysis results showed that, Under different fertilization treatments, there was a significant linear positive correlation between SMBC and SOC and between SMBN and TN (P0.01). The response coefficients of nitrogen to soil organic carbon and total nitrogen were 24.77 and 30.27, respectively, which were significantly higher than those of fertilizer or no fertilizer (19.88 and 19.86 respectively) (P0.05). The results of limit analysis showed that the maximum response of SMBC to SOC under different fertilization measures was 33.45-36.00 and the maximum response coefficient to TN was 45.45-49.79, and SMBC and SMBN still had 37.99% and 49.66% lifting space under current conditions. There were significant differences between SMBC/SOC and SMBN/TN in different climatic conditions (P0.05). The median value of SMBC/SOC in the semi-arid and semi-humid zone of the middle temperate zone was the highest (2.73%), followed by the sub-tropical humid zone (2.45%) and the warm temperate zone (2.31%). The order of median value of the median value of SMBC/SOC was 1.48% (4.72%) in the warm temperate zone (4.72%) and the lowest in the middle temperate zone (2.31%). The wetted zone in the middle temperate zone (1.80%) was wetted in the subtropical zone (2.99%) and in the moist region (3.50%). The range of SMBC/SOC and SMBN/TN under different fertilization conditions were 0.35-6.50% and 0.50-9.72%, respectively, but there was no significant difference between them (P0.05). For different fertilization measures under the same climatic conditions, organic fertilizer treatment had a significant effect on the proportion of microbial biomass carbon (nitrogen) to total organic carbon (P 0.05) only in the middle temperate humid zone (P0.05). [conclusion] Climate affects soil microbial biomass carbon. Although the proportion of microbial biomass carbon and nitrogen could not be significantly changed by different fertilization modes, the effect of organic fertilizer application on microbial biomass carbon and nitrogen was significantly higher than that on fertilizer or no fertilizer. The results are of great significance for the regulation of soil biological fertility.
【作者单位】： 中国农业科学院农业资源与农业区划研究所/耕地培育技术国家工程实验室;武汉理工大学;
【基金】：国家“十二五”国家科技支撑计划项目(2014BAD14B02,2014BAD14B03) 国家公益性行业(农业)科研专项(201203030,201303126)
【分类号】：S154.3
【相似文献】
相关期刊论文 前3条
1 宋玉芳,任丽萍,许华夏;不同施肥条件下旱田养分淋溶规律实验研究[J];生态学杂志;2001年06期
2 党廷辉,郭胜利,樊军,郝明德;长期施肥条件下黄土旱塬土壤NO_3~-N的淋溶分布规律[J];应用生态学报;2003年08期
3 ;[J];;年期
相关硕士学位论文 前2条
1 甘露;污水灌溉与施肥条件下氮素在土壤中迁移转化动态的初步研究[D];中国农业大学;2002年
2 徐金忠;不同施肥条件下黑土碳氮组分变化特征研究[D];东北林业大学;2010年
，本文编号：2287290
本文链接：https://www.wllwen.com/kejilunwen/nykj/2287290.html
