Effect of nitrogen reduction with carbon-based fertilizer on the physicochemical properties and enzyme activity of pomelo soilChinese Full TextEnglish Full Text (MT)
WU Qiangjian;HU Mengdie;HOU Songfeng;YUAN Yang;KANG Ting;XIE Kailiu;XIE Zhijian;REN Tianbao;ZHOU Chunhuo;LIU Hui;School of Land Resources and Environment/Innovative Integration Center of Industry and Education in Resource Utilization of Agricultural Waste, Prevention and Control of Non-point Pollution of Jiangxi Province/Jiangxi Jinggang Pomelo Science and Technology Backyard, Jiangxi Agricultural University;Jiangxi Institute of Agricultural Applied Microbiology, Jiangxi Academy of Agricultural Sciences;Henan Agricultural University/Henan Biochar Research Engineering Technology Center/Biochar Technology Henan Engineering Laboratory;Jiangxi Institute of Red Soil and Germplasm Resources;
Abstract: 【Objective】This paper aims to study the effects of nitrogen reduction with carbon-based fertilizer on soil physicochemical properties and soil enzyme activities in pomelo orchards, with a view to providing a theoretical basis for soil quality improvement in pomelo orchards. 【Methods】The experiment was conducted from December 2020 to November 2021 at the experimental base of Jiangxi Jinggang Pomelo Science and Technology Institute, and set up seven treatments, namely no fertilizer（CK）, optimal fertilizer（OF）, optimal fertilizer and biochar（BOF）, carbon-based fertilizer replacing 20% nitrogen fertilizer（BF20%）, carbon-based fertilizer replacing 40% nitrogen fertilizer（BF40%）, carbon-based fertilizer replacing 60% nitrogen fertilizer（BF60%）, and carbon-based fertilizer replacing 80% nitrogen fertilizer（BF80%）. Meanwhile, the soil physicochemical properties and soil enzyme activities of Jinggang pomelo orchard under the conditions of nitrogen reduction and carbon-based fertilizer application were also analyzed. 【Results】The application of carbon-based fertilizer could effectively reduce soil volume quality, increase soil porosity, water content and field water holding capacity, and the improvement effect became better with the increase of carbon-based fertilizer application. Carbon-based fertilizer treatment significantly increased soil pH, improved soil acidity and promoted the effectiveness of soil trace elements. The BF40% treatment had the best effect, which increased soil pH by 27.22%, soil exchangeable calcium and exchangeable magnesium contents by 93.17% and 48.81% respectively compared with OF treatment. Carbon-based fertilizer significantly increased the activities of soil nitrate reductase, nitrite reductase, sucrase and hydrogen peroxidase, and the BF40% treatment having the highest overall soil enzyme activity. Correlation analysis showed that there was a significant correlation between soil volume quality, porosity, water content and field water holding capacity. A significant positive correlation was showed between soil enzyme activity and its corresponding soil nutrient. 【Conclusion】The carbon-based fertilizers can effectively improve soil pore structure, soil acidity, soil nutrients and enzyme activity, with the BF40% treatment being the best effective.
Keywords：
carbon-based fertilizer; Jinggang pomelo; soil physical and chemical properties; soil enzyme activity;
- DOI：
10.16445/j.cnki.1000-2340.20220824.001
- Series：
(D) Agriculture
- Subject：
Fundamental Science of Agriculture; Agronomy; Horticulture
- Classification Code：
S154.2;S153;S666.3
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