Effects of corncob biochar application on soil characteristics and pepper growth under continuous cropping

doi:10.3969/j.issn.1004-1524.2023.01.17

Acta Agriculturae Zhejiangensis ›› 2023, Vol. 35 ›› Issue (1): 156-163.DOI: 10.3969/j.issn.1004-1524.2023.01.17

• Environmental Science • Previous Articles Next Articles

Effects of corncob biochar application on soil characteristics and pepper growth under continuous cropping

WANG Weiwei¹(), MEI Yi¹, WU Yongcheng¹, WAN Hongjian², CHEN Changjun³, ZHENG Qingsong³, ZHENG Jiaqiu¹^,^*()

1. Jiangsu Institute of Agricultural Sciences in Coastal Areas, Yancheng 224002, Jiangsu, China
2. Institute of Vegetables, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
3. College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China

Received:2021-12-10 Online:2023-01-25 Published:2023-02-21

Abstract

Abstract:

In order to investigate the effects of biochar application on soil physiochemical properties, soil microbial biomass carbon (MBC), microbial biomass nitrogen (MBN) and and plant growth indexes, different rates (5, 10, 20, 30 t·hm^-2) of corncob biochar were added to pepper continuous cropping soils in the present study. It was shown that application of appropriate rate of biochar significantly (P<0.05) increased the contents of soil organic carbon (SOC), total nitrogen, total phosphorus, available phosphorus and available potassium as compared with the CK treatment without biochar application, yet decreased the total potassium content in soil. The soil MBC/MBN and MBC/SOC were significantly (P<0.05) decreased with application of biochar as compared with CK. When the biochar addition rate was above or equal to 10 t·hm^-2, the soil MBC and MBN contents were significantly (P<0.05) increased as compared with CK. When the biochar addition rate was 10-20 t·hm^-2, the soil MBN/TN was significantly (P<0.05) increased as compared with CK. The correlationship analysis showed that the soil MBC and MBN were significantly (P<0.01) positively correlated with soil total nitrogen, organic carbon, total phosphorus and available phosphorus, and were significantly (P<0.01) negatively correlated with soil total potassium. When the application rate of biochar was 5-20 t·hm^-2, the pepper yield per plant was significantly (P<0.05) increased as compared with CK, and the highest value was recorded under the application rate of 20 t·hm^-2. But, the higher application rate did not support the further increase of pepper yield. In conclusion, the modest biochar application could improve soil micro-environment and soil fertility, promote pepper growth and increase pepper yield.

Key words: biochar, continuous cropping soil, soil physical and chemical properties, microbial biomass carbon, microbial biomass nitrogen

CLC Number:

WANG Weiwei, MEI Yi, WU Yongcheng, WAN Hongjian, CHEN Changjun, ZHENG Qingsong, ZHENG Jiaqiu. Effects of corncob biochar application on soil characteristics and pepper growth under continuous cropping[J]. Acta Agriculturae Zhejiangensis, 2023, 35(1): 156-163.

Figures/Tables 5

References 36

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处理 Treatment	pH	SOC/ (g·kg^-1)	TN/ (g·kg^-1)	SOC/ TN	TP/ (mg·kg^-1)	AP/ (mg·kg^-1)	TK/ (g·kg^-1)	AK/ (mg·kg^-1)
CK	7.49± 0.13 a	8.30± 0.18 d	0.90± 0.05 c	9.28± 0.39 d	881.28± 83.06 c	33.97± 3.78 b	2.26± 0.05 ab	259.50± 6.87 b
T1	7.43± 0.07 a	12.78± 0.86 c	1.02± 0.09 bc	12.59± 0.34 c	1 016.50± 72.98 bc	34.03± 4.36 b	2.27± 0.03 a	296.35± 9.54 a
T2	7.41± 0.10 a	14.45± 1.28 c	1.09± 0.14 b	13.34± 0.56 c	974.13± 11.94 bc	44.56± 2.97 b	2.23± 0.02 ab	310.83± 10.56 a
T3	7.40± 0.10 a	23.11± 1.58 b	1.45± 0.11 a	15.94± 0.09 b	1 132.08± 98.24 b	72.85± 10.28 a	2.11± 0.07 c	294.94± 6.51 a
T4	7.34± 0.06 a	26.31± 1.66 a	1.54± 0.09 a	17.12± 0.55 a	1 354.27± 125.17 a	76.69± 2.90 a	2.15± 0.05 bc	272.49± 11.65 b

处理 Treatment	pH	SOC/ (g·kg^-1)	TN/ (g·kg^-1)	SOC/ TN	TP/ (mg·kg^-1)	AP/ (mg·kg^-1)	TK/ (g·kg^-1)	AK/ (mg·kg^-1)
CK	7.49± 0.13 a	8.30± 0.18 d	0.90± 0.05 c	9.28± 0.39 d	881.28± 83.06 c	33.97± 3.78 b	2.26± 0.05 ab	259.50± 6.87 b
T1	7.43± 0.07 a	12.78± 0.86 c	1.02± 0.09 bc	12.59± 0.34 c	1 016.50± 72.98 bc	34.03± 4.36 b	2.27± 0.03 a	296.35± 9.54 a
T2	7.41± 0.10 a	14.45± 1.28 c	1.09± 0.14 b	13.34± 0.56 c	974.13± 11.94 bc	44.56± 2.97 b	2.23± 0.02 ab	310.83± 10.56 a
T3	7.40± 0.10 a	23.11± 1.58 b	1.45± 0.11 a	15.94± 0.09 b	1 132.08± 98.24 b	72.85± 10.28 a	2.11± 0.07 c	294.94± 6.51 a
T4	7.34± 0.06 a	26.31± 1.66 a	1.54± 0.09 a	17.12± 0.55 a	1 354.27± 125.17 a	76.69± 2.90 a	2.15± 0.05 bc	272.49± 11.65 b

处理 Treatment	MBC/ (mg·kg^-1)	MBN/ (mg·kg^-1)	MBC/MBN
CK	162.25±3.27 d	26.83±0.45 d	6.05±0.02 a
T1	177.94±17.97 cd	30.21±2.34 d	5.89±0.08 b
T2	196.73±13.59 c	36.16±2.80 c	5.44±0.05 d
T3	271.58±13.85 a	50.66±2.43 a	5.36±0.03 d
T4	244.81±11.58 b	42.44±1.58 b	5.77±0.07 c

处理 Treatment	MBC/ (mg·kg^-1)	MBN/ (mg·kg^-1)	MBC/MBN
CK	162.25±3.27 d	26.83±0.45 d	6.05±0.02 a
T1	177.94±17.97 cd	30.21±2.34 d	5.89±0.08 b
T2	196.73±13.59 c	36.16±2.80 c	5.44±0.05 d
T3	271.58±13.85 a	50.66±2.43 a	5.36±0.03 d
T4	244.81±11.58 b	42.44±1.58 b	5.77±0.07 c

指标Index	TN	SOC	TK	pH	TP	AP	AK
MBC	0.944^**	0.927^**	-0.695^**	-0.418	0.727^**	0.923^**	0.200
MBN	0.899^**	0.885^**	-0.696^**	-0.386	0.652^**	0.888^**	0.292
MBC/MBN	-0.492	-0.512	0.501	0.227	-0.229	-0.517^*	-0.667^**
MBC/SOC	-0.851^**	-0.913^**	0.531^*	0.501	-0.831^**	-0.778^**	-0.338
MBN/TN	-0.061	-0.025	-0.335	0.086	-0.309	0.054	0.453

Effects of corncob biochar application on soil characteristics and pepper growth under continuous cropping

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处理 Treatment	株高 Plant height/cm	株幅 Plant width/cm	茎粗 Stem diameter/mm	单株产量 Yield per plant/kg	植株鲜重 Fresh weight/kg
CK	93.11±6.29 b	96.53±3.20 b	16.36±0.36 c	1.24±0.04 c	0.50±0.04 b
T1	99.10±3.02 ab	105.42±2.64 a	17.18±0.50 bc	1.42±0.09 b	0.58±0.01 a
T2	99.09±5.81 ab	107.23±1.72 a	18.21±0.08 ab	1.45±0.01 b	0.60±0.03 a
T3	103.84±2.66 a	111.13±5.60 a	19.57±1.28 a	1.62±0.05 a	0.62±0.03 a
T4	91.63±4.00 b	94.28±2.21 b	17.30±1.07 bc	1.22±0.08 c	0.47±0.05 b

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