Effects of biochar application on soil physiochemical indicators at sloping farmland in black soil region

doi:10.3969/j.issn.1004-1524.20231039

Acta Agriculturae Zhejiangensis ›› 2024, Vol. 36 ›› Issue (9): 2060-2069.DOI: 10.3969/j.issn.1004-1524.20231039

• Environmental Science • Previous Articles Next Articles

Effects of biochar application on soil physiochemical indicators at sloping farmland in black soil region

WU Jialong¹(), CHI Ming², GAO Yan³, WANG Xiang⁴, SHEN Haiou¹^,^*()

1. College of Resources and Environment, Jilin Agricultural University, Changchun 130118, China
2. Dandong Water Service Center, Dandong 118100, Liaoning, China
3. Songliao Soil and Water Conservation Monitoring Center Station of Songliao Water Resources Commission, Changchun 130021, China
4. College of Land Science and Technology, China Agricultural University, Beijing 100193, China

Received:2023-08-29 Online:2024-09-25 Published:2024-09-30

Abstract

Abstract:

In the present study, an in-situ monitoring experiment was carried out at the sloping farmland to reveal the effects of biochar application during one year (from May to October) on soil bulk density, mass water content, pH, electrical conductivity, organic matter content and cation exchange capacity in black soil region, northeast China. Two experimental treatments were designed, including no biochar application (CK) and application of 30 t·hm^-2 biochar (SW). The results showed that biochar application during one year decreased soil bulk density. Compared to the CK, the soil bulk density of ridge mound was decreased by 6.42%-11.21% from June to October. The decrease range of soil bulk density was lowered with time. The biochar application decreased the soil mass water content from June to August, and the decrease range of ridge mound was smaller than that of ridge furrow. When the slope position was from top to bottom, the decrease range of soil mass water contents decreased gradually. However, the biochar application increased the soil mass water content from September to October, and the increase range of ridge mound was greater than that of ridge furrow. When the slope position was from top to bottom, the increase range of soil mass water content was elevated gradually. Furthermore, the biochar application increased soil pH, organic matter content yet decreased soil electrical conductivity. Therefore, biochar application during one year could change the typical soil physical and chemical indicators, hence improve soil quality.

Key words: biochar, soil bulk density, soil mass water content, soil chemistry indicator, slope position, black soil region

CLC Number:

S157.1

WU Jialong, CHI Ming, GAO Yan, WANG Xiang, SHEN Haiou. Effects of biochar application on soil physiochemical indicators at sloping farmland in black soil region[J]. Acta Agriculturae Zhejiangensis, 2024, 36(9): 2060-2069.

Figures/Tables 5

Fig.1 Experimental plot photo (a) and schematic diagram of sampling positions (b)

Fig.2 Bars marked without the same uppercase letters indicate significant (P<0.05) difference between treatments in the same month and same sampling position, while bars marked without the same lowercase letters indicate significant (P<0.05) difference within the sampling positions in the same month under the same treatment.

Fig.3 Changes of soil mass water content in 0-20 cm soil layer at sloping farmland from May to October under treatments

Fig.4 Mass water contents of different soil layers in sloping farmland under treatments Bars marked without the same uppercase letters indicate significant (P<0.05) difference between treatments in the same month, same soil layer and same sampling position, while bars marked without the same lowercase letters indicate significant (P<0.05) difference within soil layers in the same month, sample sampling position under the same treatment.

Table 1 Effects of biochar application on soil chemical indicators of sloping farmland

采样时间 Sampling time	处理 Treatment	pH	EC/(mS·m^-1)	SOM/(g·kg^-1)	CEC/(cmol·kg^-1)
5月May	CK	5.79±0.04 Ab	0.91±0.07 Aa	23.03±0.99 Ab	18.38±1.09 Aa
	SW	5.60±0.03 Bc	0.97±0.04 Aa	21.38±0.33 Bc	18.23±0.15 Aa
8月August	CK	5.81±0.05 Bb	0.56±0.02 Ab	24.41±1.15 Bab	17.87±0.41 Aa
	SW	6.16±0.26 Ab	0.86±0.26 Aa	30.32±1.55 Ab	17.51±0.30 Ab
10月October	CK	6.06±0.14 Ba	0.66±0.09 Ab	26.63±2.05 Ba	18.45±0.17 Aa
	SW	6.45±0.06 Aa	0.50±0.02 Bb	41.60±3.48 Aa	18.68±0.51 Aa

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Effects of biochar application on soil physiochemical indicators at sloping farmland in black soil region

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