秸秆生物炭对黄土区农田土壤养分和作物生长的影响

卢晋晶,郜春花,李建华,靳东升,卢朝东,董云中

中国农学通报. 2017, 33(33): 92-99

中国农学通报 ›› 2017, Vol. 33 ›› Issue (33) : 92-99. DOI: 10.11924/j.issn.1000-6850.casb16090012
资源 环境 生态 土壤 气象

秸秆生物炭对黄土区农田土壤养分和作物生长的影响

  • 卢晋晶,郜春花,李建华,靳东升,卢朝东,董云中
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Effect of Biochar on Soil Nutrients and Corn Growth in Farmland of Loess Area

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摘要

旨在探索生物炭对黄土区农田的具体应用效果。采用大田试验,在不施氮肥和施氮肥(187.5 kg/hm2)处理下,分别设计了不同生物炭用量(0、6、12、24、48 t/hm2)试验,来观察对黄土高原农田土壤养分和玉米生长的影响。结果发现:当施入187.5 kg/hm2氮肥时,24~48 t/hm2范围内的生物炭施用量对土壤养分促进作用效果最佳,其中48 t/hm2时全氮超出对照26.6%,碱解氮可超过对照约27.67%;6~12 t/hm2的范围时,玉米茎粗、叶绿素在生长中期均相对处于优势,且玉米养分含量和产量结果优于生物炭量大的处理。不施氮的情况下,生物炭也可促进土壤和玉米籽粒养分的积累。其中6~12 t/hm2时,土壤和玉米籽粒养分含量相对较高;24~48 t/hm2时玉米产量结果最佳,比对照高1468.2 kg/hm2,约13.39%。结果表明,生物炭的添加对土壤的养分影响较大,且一定程度上依赖于氮肥的投入情况。

Abstract

The aim is to explore the application effect of biochar additions on farmland in loess area. In a field experiment, different biochar levels of 0, 6, 12, 24, 48 t/hm2 and two nitrogen levels of 0 and 187.5 kg/hm2 were set up. The effect on soil nutrients and corn growth in farmland of loess area was studied. The results revealed that the application of biochar of 24-48 t/hm2 mixed with 187.5 kg/hm2 N had the best promoting effect on soil nutrients. The total nitrogen and available nitrogen accumulations exceeded those of control by approximately 26.6% and 27.67% respectively at 48 t/hm2 biochar level. At 6-12 t/hm2 biochar level, stem diameter and chlorophyll had relative advantage at the middle growth stage. In addition, the nutrient content and yield were higher compared with those under high biochar levels. Under no nitrogen application, biochar could contribute to nutrients accumulation in soil and corn grain. Soil nutrients and corn grain were relatively higher at 6-12 t/hm2; the yield was the highest at level 24-48 t/hm2, increased by 1468.2 kg/hm2, about 13.39% compared with that of control. These results suggested that biochar had positive roles in promoting soil nutrients accumulations, and depended on nitrogen fertilizer in some degree.

关键词

生物炭;氮肥;土壤;玉米;养分

Key words

biochar; nitrogen fertilizer; soil; maize; nutrients

引用本文

导出引用
卢晋晶,郜春花,李建华,靳东升,卢朝东,董云中. 秸秆生物炭对黄土区农田土壤养分和作物生长的影响. 中国农学通报. 2017, 33(33): 92-99 https://doi.org/10.11924/j.issn.1000-6850.casb16090012
Effect of Biochar on Soil Nutrients and Corn Growth in Farmland of Loess Area. Chinese Agricultural Science Bulletin. 2017, 33(33): 92-99 https://doi.org/10.11924/j.issn.1000-6850.casb16090012

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