Improvement effects of polypeptide on strongly acidified soil
WANG Shilin1,, WANG Tiejun1, WU Honghong1, LIU Ziwei1, LI Dandan1, YAO Lunguang2, FAN Xianpeng3, WANG Hua3, TANG Xingchun1, LI Yadong1,, 1.State Key Laboratory of Biocatalysis and Enzyme Engineering, School of Life Sciences, Hubei University, Wuhan 430062, China 2.Collaborative Innovation Center of Water Security for Water Source Region of Mid-Route Project of South-North Water Diversion of Henan Province, School of Agricultural Engineering, Nanyang Normal University, Nanyang 473061, China 3.Institute of Plant Protection and Soil Fertlizer, Hubei Academy of Agricultural Sciences, Wuhan 430064, China
Abstract:In this study, compared with conventional acidified soil remediation technology with quicklime addition and conventional planting technology with compound fertilizer addition, the improvement effect of polypeptide as a new type of soil amendment on strongly acidified soil was investigated. The results show that polypeptide and quicklime had alkalization effect on the strongly acidified soil during soil culture experiments, the soil pH increased by 0.23 and 0.30 (120 d stable value), respectively, while the alkalization degree of compound fertilizer treated soil was lower (0.02). At the same time, the exchangeable acidity contents of polypeptide treated soil (12.56 mmol·kg?1) and quicklime treated soil (18.68 mmol·kg?1) were lower than that of compound fertilizer group (35.93 mmol·kg?1), respectively; and their base saturation percentages were 7.01% and 9.85% higher than that of the compound fertilizer group (67.30%), respectively. And the change of soil organic matter content in the polypeptide treated soil (19.96 g·kg?1) was remarkable, and significantly higher than that in the compound fertilizer treated soil (8.58 g·kg?1) and quicklime treated soil (12.23 g·kg?1). Polypeptide and quicklime treatment could increase the pH of strongly acidified soil, while it could not reach the neutral pHs higher than 6.5 at one time. Based on above results, cabbage was used as the experimental plant to study whether it could be planted under this background. The results showed that high-yield cabbage could be planted in polypeptide treated soil at low pH, and this significant effect was proved by its average biomass of 371.78 g which was 9.54 and 1.90 times higher than that in the compound fertilizer and quicklime treated soil, respectively. Polypeptide had the potential for strongly acidified soil improvement, and could achieve the synchronization of improvement and planting (directly planting crop seedlings after polypeptide addition). This study provides reference for strongly acidified soil improvement and the following plant planting. Key words:polypeptide/ strongly acidified soil/ soil improvement/ plant cultivation.
图1蛋白多肽对培养土壤pH的影响 Figure1.Effect of polypeptide on pH of culture soil
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1.State Key Laboratory of Biocatalysis and Enzyme Engineering, School of Life Sciences, Hubei University, Wuhan 430062, China 2.Collaborative Innovation Center of Water Security for Water Source Region of Mid-Route Project of South-North Water Diversion of Henan Province, School of Agricultural Engineering, Nanyang Normal University, Nanyang 473061, China 3.Institute of Plant Protection and Soil Fertlizer, Hubei Academy of Agricultural Sciences, Wuhan 430064, China Received Date: 2019-12-19 Accepted Date: 2020-03-28 Available Online: 2020-07-10 Keywords:polypeptide/ strongly acidified soil/ soil improvement/ plant cultivation Abstract:In this study, compared with conventional acidified soil remediation technology with quicklime addition and conventional planting technology with compound fertilizer addition, the improvement effect of polypeptide as a new type of soil amendment on strongly acidified soil was investigated. The results show that polypeptide and quicklime had alkalization effect on the strongly acidified soil during soil culture experiments, the soil pH increased by 0.23 and 0.30 (120 d stable value), respectively, while the alkalization degree of compound fertilizer treated soil was lower (0.02). At the same time, the exchangeable acidity contents of polypeptide treated soil (12.56 mmol·kg?1) and quicklime treated soil (18.68 mmol·kg?1) were lower than that of compound fertilizer group (35.93 mmol·kg?1), respectively; and their base saturation percentages were 7.01% and 9.85% higher than that of the compound fertilizer group (67.30%), respectively. And the change of soil organic matter content in the polypeptide treated soil (19.96 g·kg?1) was remarkable, and significantly higher than that in the compound fertilizer treated soil (8.58 g·kg?1) and quicklime treated soil (12.23 g·kg?1). Polypeptide and quicklime treatment could increase the pH of strongly acidified soil, while it could not reach the neutral pHs higher than 6.5 at one time. Based on above results, cabbage was used as the experimental plant to study whether it could be planted under this background. The results showed that high-yield cabbage could be planted in polypeptide treated soil at low pH, and this significant effect was proved by its average biomass of 371.78 g which was 9.54 and 1.90 times higher than that in the compound fertilizer and quicklime treated soil, respectively. Polypeptide had the potential for strongly acidified soil improvement, and could achieve the synchronization of improvement and planting (directly planting crop seedlings after polypeptide addition). This study provides reference for strongly acidified soil improvement and the following plant planting.
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