Effects of Long-term Located Continuous Application of Biochar on Soil Physical Properties of Planting Tobacco

doi:10.7668/hbnxb.2018.03.027

Abstract

Abstract: In order to improve soil physical properties and study the long-term effects of continuous application of biochar on soil physical properties of planting tobacco. Yunyan 87 was selected as testing material and a three years located experiment was designed to study the effects of continuous application of biochar on soil physical properties of planting tobacco. The results showed that continuous application of biochar could obviously affect the soil physical properties. Continuous application of biochar promoted the soil moisture content in each periods of flue-cured tobacco growth in 2015,the soil moisture content increased by 3.243-3.983 percentage points,which had extremely significant difference,while the soil moisture content increased or decreased compared with the control at each periods of flue-cured tobacco growth in 2016 and 2017,and no significant difference was found. The soil bulk density increased by 0.083 percentage points and the porosity decreased by 3.113 percentage points at 30 days after transplanting in 2015 after continuous application of biochar,but no significant difference was found,the soil bulk density decreased by 0.010-0.144 percentage points and the porosity increased by 0.500-5.537 percentage points at each periods in other years after continuous application of biochar,and the effects of biochar on the soil bulk density and porosity were significant difference at 30 days after transplanting in 2017. Continuous application of biochar had little impact on the ratio of solid phase of soil at each periods in 2015 and 2016,which could significantly reduced the ratio of solid phase of soil at 30 days after transplanting in 2017. Continuous application of biochar could extremely significantly increased the ratio of liquid phase of soil at each periods in 2015,and reduced the ratio of gas phase of soil at 30 days after transplanting in 2015,while had little impact on the ratio of solid phase and ratio of gas phase of soil at each periods in other years. The results of principal component analysis of the index of soil physical properties in each period of different years showed that the soil physical properties were obviously different from the control after continuous application of biochar,which was beneficial to the improvement of soil physical properties.

Key words: Located experiment, Biochar, Soil, Physical properties

CLC Number:

S147.2
S572

LIU Hui, ZHOU Qingming, LI Juan, XIANG Deming, ZHANG Liming. Effects of Long-term Located Continuous Application of Biochar on Soil Physical Properties of Planting Tobacco[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2018, 33(3): 182-188. doi: 10.7668/hbnxb.2018.03.027.

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