Journal of Ecology and Rural Environment ›› 2020, Vol. 36 ›› Issue (12): 1605-1611.doi: 10.19741/j.issn.1673-4831.2020.0320

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Effect of Biochar on Soil Physical Characteristics Improvement in Land Consolidation Region

DENG Jian-qiang1, FANG Wu-jun2, WANG Yong3, WU Dong4, FAN Jun1   

  1. 1. Enshi Tobacco Company of Hubei Province Corporation, Enshi 445000, China;
    2. Xiangyang Cigarette Factory of Hubei Tobacco Industrial Co. Ltd., Xiangyang 441000, China;
    3. Hongan Cigarette Factory of Hubei Tobacco Industrial Co. Ltd., Hongan 438400, China;
    4. Hubei Tobacco Industrial Co. Ltd., Wuhan 430000, China
  • Received:2020-04-30 Published:2020-12-23

Abstract: In order to improve soil physical conditions of land consolidation region, a field experiment was designed to study the effect of biochar addition on soil physical characteristics. The biochar addition treatments (0, 7.5, 15, 30 and 45 t·hm-2) were set to study the influence of biochar on soil bulk density, saturated hydraulic conductivity, water-stable aggregates, soil water holding capacity and other indicators. The results show that (1) The soil bulk density decreased by 1.67%-8.19% with biochar treatments and when the biochar application rate was >30 t·hm-2, the soil bulk density was significantly decreased. (2) When compared with CK, >0.25-0.5 mm macro soil aggregates was increased by biochar application treatments, while the >5 mm macro soil aggregates and MWD decreased. (3) The application of biochar increased the water retention capacity by adjusting the soil water release capacity, but higher application of biochar could only slightly increase soil wilting water content. Therefore, it was suggested that the best application rate of biochar to be about 15 t·hm-2 in land consolidation region, which could improve soil water stable macro-aggregates (>0.25-0.5 mm) and soil water release capacity.

Key words: land consolidation, biochar, soil physical characteristics, fertility betterment

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