氯嘧磺隆与尿素对土壤微生物生物量碳、氮及无机氮的影响

应用生态学报 ›› 2012, Vol. 23 ›› Issue (08): 2219-2224.

氯嘧磺隆与尿素对土壤微生物生物量碳、氮及无机氮的影响

谭焕波^1,2,李新宇¹,张惠文¹,李旭¹,徐明恺^1**

(¹中国科学院沈阳应用生态研究所森林与土壤生态国家重点实验室，沈阳 110164； ²中国科学院研究生院，北京 100049)

出版日期:2012-08-18 发布日期:2012-08-18

Effects of chlorimuronethyl and urea on soil microbial biomass carbon and nitrogen and soil inorganic nitrogen.

TAN Huan-bo^1,2, LI Xin-yu¹, ZHANG Hui-wen¹, LI Xu¹, XU Ming-kai¹

(¹State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110164, China; ²Graduate University of Chinese Academy of Sciences, Beijing 100049, China).

Online:2012-08-18 Published:2012-08-18

摘要/Abstract

摘要： 通过室内培养试验，研究了不同浓度氯嘧磺隆(20、200、2000 μg·kg^-1土)单一施用及与尿素(120 mg·kg^-1土)配合施用情况下，土壤微生物生物量碳、氮和土壤铵态氮、硝态氮随时间的动态变化规律.结果表明：各浓度氯嘧磺隆单独处理在整个培养期(60 d)中对微生物生物量碳、氮均有抑制作用，且浓度越高，后期抑制作用越强；各浓度氯嘧磺隆处理在培养前期对硝态氮、铵态氮没有明显影响，中期(15 d)能显著提高土壤中铵态氮的含量，后期(30 d后)显著提高了土壤中硝态氮的含量.尿素单独施用及与氯嘧磺隆配施均能在短时间内增加微生物生物量碳、氮，但随后配施处理的促进作用减弱；尿素单独和配施均能持久增加土壤中铵态氮、硝态氮含量

Abstract: A microcosm experiment was conducted to study the effects of different concentration chlorimuron-ethyl (20, 200, and 2000 μg·kg^-1 soil) and its combination with urea (120 mg·kg^-1 soil) on the dynamic changes of soil microbial biomass carbon and nitrogen and soil nitrate nitrogen and ammonium nitrogen. Applying chlorimuronethyl alone decreased the soil microbial biomass carbon and nitrogen throughout the experiment period (60 days), and the decrement increased with increasing chlorimuronethyl concentration. Chlorimuronethyl had little effects on the soil ammonium nitrogen and nitrite nitrogen in the early period of the experiment, but increased the soil ammonium nitrogen in the midperiod (15 d) and the soil nitrate nitrogen in the late period (after 30 days) significantly. Both urea addition and its combination with chlorimuronethyl increased the soil microbial biomass carbon and nitrogen obviously in a short time, but the effect of combined addition of urea and chlorimuron-ethyl weakened then. Applying urea and its combination with chlorimuronethyl resulted in a lasting increase of soil nitrate nitrogen and ammonium nitrogen.

谭焕波1,2,李新宇1,张惠文1,李旭1,徐明恺1**. 氯嘧磺隆与尿素对土壤微生物生物量碳、氮及无机氮的影响[J]. 应用生态学报, 2012, 23(08): 2219-2224.

TAN Huan-bo1,2, LI Xin-yu1, ZHANG Hui-wen1, LI Xu1, XU Ming-kai1. Effects of chlorimuronethyl and urea on soil microbial biomass carbon and nitrogen and soil inorganic nitrogen.[J]. Chinese Journal of Applied Ecology, 2012, 23(08): 2219-2224.