生物炭对土壤物理性状及异噁草松消减的影响

生态学杂志

生物炭对土壤物理性状及异噁草松消减的影响

李玉梅^1,2,王根林³,李欣洁^1,4,于洪久³,郭炜³,魏丹^1**,刘忠堂³

（¹黑龙江省农业科学院土壤肥料与环境资源研究所，黑龙江省农业科学院博士后科研工作站，哈尔滨 150086； ^2东北林业大学博士后科研流动站，哈尔滨 150010； ³黑龙江省农业科学院，哈尔滨 150086； ⁴东北农业大学，哈尔滨 150001）

出版日期:2014-03-10 发布日期:2014-03-10

Effects of bio-char on soil physical properties and clomazone degradation.

LI Yu-mei^1,2, WANG Gen-lin³, LI Xin-jie^1,4, YU Hong-jiu³, GUO Wei³, WEI Dan^1**, LIU Zhong-tang^3

(¹Institute of Soil Fertilizer and Environment Resource, Heilongjiang Academy of Agriculture Sciences; Postdoctoral Program of Heilongjiang Academy of Agricultural Sciences, Harbin 150086, China; ²Postdoctoral Program of Northeast Forestry University, Harbin 150010, China; ^3Heilongjiang Academy of Agricultural Sciences, Harbin 150086, China; ⁴Northeast Agricultural University, Harbin 150001, China)

Online:2014-03-10 Published:2014-03-10

摘要/Abstract

摘要：

采用桶柱和盆栽试验，模拟长残效除草剂土壤残留环境，研究生物炭对土壤物理性状以及异噁草松残留消减的影响。结果表明：土壤中施入水稻秸秆生物炭在2～32 mg·kg^-1范围内，容重平均降低0.126 g·cm^-3，固相比平均降低21.2%，气相和液相比分别增加29.8%和15.3%，土壤物理性状明显改善；桶柱试验表明，异噁草松主要分布在30 cm以上土层，初始浓度越高，土壤残留量越大；生物炭对土壤中异噁草松的消减有促进作用，随着施炭量的增加，异噁草松土壤残留量降低，对作物的生物有害性降低。

关键词: 根长, 根表面积, 耕作方式, 产量

Abstract: The effects of bio-char derived from rice straw on soil physical properties and clomazone residual degradation were studied by barrel column and pot experiments simulating the degradation of persistent herbicides in soil environment. The results showed that when applying 2-32 mg·kg^-1 of bio-char in soil, the soil bulk density was decreased on average by 0.126 g·cm^-3, the solid phase ratio was reduced by an average of 21.2%, and the gas and liquid phase ratios were increased by 29.8% and 15.3%, respectively, which meant that soil physical properties were improved. The barrel column test indicated that clomazone was mainly distributed in the soil layer above 30 cm, and its residue in soil was greater when its initial concentration was higher. Bio-char promoted the degradation of clomazone in the soil. With the increase of biochar content in soil, clomazone residue in soil was reduced, decreasing its biological hazard to crops.

Key words: tillage practice, root surface area, yield., root length

李玉梅1,2,王根林3,李欣洁1,4,于洪久3,郭炜3,魏丹1**,刘忠堂3. 生物炭对土壤物理性状及异噁草松消减的影响[J]. 生态学杂志.

LI Yu-mei1,2, WANG Gen-lin3, LI Xin-jie1,4, YU Hong-jiu3, GUO Wei3, WEI Dan1**, LIU Zhong-tang3. Effects of bio-char on soil physical properties and clomazone degradation.[J]. cje.

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