Effects of synergistic enhancement of straw returning to the field with decomposition agent and biochar on soil quality and rice growth

doi:10.3969/j.issn.1004-1524.20240427

Acta Agriculturae Zhejiangensis ›› 2025, Vol. 37 ›› Issue (5): 1139-1148.DOI: 10.3969/j.issn.1004-1524.20240427

• Environmental Science • Previous Articles Next Articles

Effects of synergistic enhancement of straw returning to the field with decomposition agent and biochar on soil quality and rice growth

SU Yang¹(), SHANG Xiaolan², QIAN Zhongming³, WU Lingen³, HUANG Jiaqi³, ZHUANG Haifeng⁴, ZHAO Yufei⁴, DANG Hongyang⁵, XU Lijun³^,^*()

1. School of Art and Design, Zhejiang Gongshang University Hangzhou College of Commerce,Hangzhou 311599, China
2. Hangzhou Agricultural Technology Extension Center, Hangzhou 310020, China
3. Tonglu County Agricultural Technology Extension Center, Tonglu 311500, Zhejiang, China
4. Zhejiang Key Laboratory of Waste Biomass Recycling and Ecological Processing Technology, Zhejiang University of Science & Technology, Hangzhou 310023, China
5. Bureau of Agriculture and Rural Affairs of Changshan County, Changshan 324299, Zhejiang, China

Received:2024-05-11 Online:2025-05-25 Published:2025-06-11

Abstract

Abstract:

In order to investigate the synergistic effects of decomposition agents and biochar on soil quality and rice growth with straw returning to the field, five treatment groups were designed: control group (S1); straw return group (S2); straw return with decomposition agent (S3); straw return with biochar (S4); straw return with both decomposition agent and biochar (S5). A field experiment was performed to analyze the impacts of different treatments on soil physicochemical properties, enzymatic activities, microbial community structure, and rice growth and development. It was shown that the combined application of decomposition agent and biochar significantly (P<0.05) increased the contents of total nitrogen, total phosphorus, total potassium, organic matter, available phosphorus, available potassium in soil as compared with the S2 treatment. The soil catalase activity and sucrase activity were significantly increased by 16.06% and 19.11%, respectively, at the rice maturity stage under the S5 treatment than those under the S2 treatment. Besides, the combined application of decomposition agent and biochar positively enhanced the soil microbial diversity, abundance. Additionally, compared with the S2 treatment, the rice yield and aboveground biomass were significantly increased by 11.42% and 11.74%, respectively, under the S5 treatment, while the total uptake of nitrogen, phosphorus and potassium in the aboveground part of rice was significantly increased by 24.00%, 26.12% and 13.21%, respectively. These findings demonstrated promising practical benefits of decomposition agent and biochar in enhancing nutrient uptake and increasing rice yield, highlighted the synergistic effects in promoting efficient straw incorporation and improving the soil ecosystem, provided scientific basis for the practical application of new technologies for the efficient utilization of agricultural waste such as straw.

Key words: straw incorporation, decomposition agent, biochar, soil quality, rice growth

CLC Number:

SU Yang, SHANG Xiaolan, QIAN Zhongming, WU Lingen, HUANG Jiaqi, ZHUANG Haifeng, ZHAO Yufei, DANG Hongyang, XU Lijun. Effects of synergistic enhancement of straw returning to the field with decomposition agent and biochar on soil quality and rice growth[J]. Acta Agriculturae Zhejiangensis, 2025, 37(5): 1139-1148.

Figures/Tables 6

References 37

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样品 Sample	Ace指数 Ace index	Chao指数 Chao index	香农指数 Shannon index	覆盖度 Coverage/%
S1	5 640.90	5 580.43	7.13	99.04
S2	5 760.50	5 680.78	7.10	98.92
S3	5 831.73	5 730.73	7.17	98.98
S4	5 748.72	5 696.04	7.20	99.02
S5	6 211.07	6 142.42	7.30	98.86

样品 Sample	Ace指数 Ace index	Chao指数 Chao index	香农指数 Shannon index	覆盖度 Coverage/%
S1	5 640.90	5 580.43	7.13	99.04
S2	5 760.50	5 680.78	7.10	98.92
S3	5 831.73	5 730.73	7.17	98.98
S4	5 748.72	5 696.04	7.20	99.02
S5	6 211.07	6 142.42	7.30	98.86

处理 Treatment	产量 Yield/ (t·hm^-2)	千粒重 1 000-grain weight/g	结实率 Seed setting rate/%	地上部干重 Dry weight of aboveground part/(t·hm^-2)	氮素吸收总量 Nitrogen uptake/ (kg·hm^-2)	磷素吸收总量 Phosphorus uptake/ (kg·hm^-2)	钾素吸收总量 Potassium uptake/ (kg·hm^-2)
S1	5.87 ±0.12 c	21.72 ±0.16 b	89.10 ±1.16 b	9.59 ±0.18 c	78.86 ±3.62 b	13.49 ±0.25 d	72.76 ±5.26 c
S2	6.14 ±0.19 bc	22.09 ±0.10 a	91.05 ±0.67 a	10.15±0.46 bc	84.38 ±9.05 b	15.46 ±0.24 c	82.61±7.02 bc
S3	6.47 ±0.27 ab	22.05 ±0.18 a	91.75 ±0.84 a	10.72 ±0.51 ab	95.83 ±5.80 a	16.92 ±0.98 b	86.74 ±5.13 ab
S4	6.72 ±0.06 a	21.96 ±0.16 ab	91.73 ±0.78 a	11.04 ±0.39 a	101.62 ±2.27 a	19.11 ±0.28 a	92.13 ±3.83 ab
S5	6.84 ±0.29 a	22.27 ±0.18 a	92.22 ±0.28 a	11.34 ±0.19 a	104.63±1.15 a	19.49 ±0.91 a	93.52 ±2.47 a

处理 Treatment	产量 Yield/ (t·hm^-2)	千粒重 1 000-grain weight/g	结实率 Seed setting rate/%	地上部干重 Dry weight of aboveground part/(t·hm^-2)	氮素吸收总量 Nitrogen uptake/ (kg·hm^-2)	磷素吸收总量 Phosphorus uptake/ (kg·hm^-2)	钾素吸收总量 Potassium uptake/ (kg·hm^-2)
S1	5.87 ±0.12 c	21.72 ±0.16 b	89.10 ±1.16 b	9.59 ±0.18 c	78.86 ±3.62 b	13.49 ±0.25 d	72.76 ±5.26 c
S2	6.14 ±0.19 bc	22.09 ±0.10 a	91.05 ±0.67 a	10.15±0.46 bc	84.38 ±9.05 b	15.46 ±0.24 c	82.61±7.02 bc
S3	6.47 ±0.27 ab	22.05 ±0.18 a	91.75 ±0.84 a	10.72 ±0.51 ab	95.83 ±5.80 a	16.92 ±0.98 b	86.74 ±5.13 ab
S4	6.72 ±0.06 a	21.96 ±0.16 ab	91.73 ±0.78 a	11.04 ±0.39 a	101.62 ±2.27 a	19.11 ±0.28 a	92.13 ±3.83 ab
S5	6.84 ±0.29 a	22.27 ±0.18 a	92.22 ±0.28 a	11.34 ±0.19 a	104.63±1.15 a	19.49 ±0.91 a	93.52 ±2.47 a

Effects of synergistic enhancement of straw returning to the field with decomposition agent and biochar on soil quality and rice growth

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