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| Comprehensive evaluation of different new fertilizers on sustainable growth of open field cabbage in southwest China |
| Received:July 08, 2024 |
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| KeyWord:slow/ controlled release fertilizer;nitrification inhibitor;output;fertilizer utilization efficiency;greenhouse gas emissions;net economic benefit of ecosystem |
| Author Name | Affiliation | E-mail | | SHEN Xiaoge | College of Resources and Environment, Southwest University, Chongqing 400716, China
Southwest University Yangtze River Economic Belt Agricultural Green Development Research Center, Chongqing 400716, China | | | ZENG Zhen | Chongqing Tongliang District Agricultural and Rural Committee, Chongqing 401120, China | | | WU Ji | College of Resources and Environment, Southwest University, Chongqing 400716, China
Southwest University Yangtze River Economic Belt Agricultural Green Development Research Center, Chongqing 400716, China | | | LUO Xu | College of Resources and Environment, Southwest University, Chongqing 400716, China
Southwest University Yangtze River Economic Belt Agricultural Green Development Research Center, Chongqing 400716, China | | | FU Jian | Chongqing Tongliang District Agricultural and Rural Committee, Chongqing 401120, China | | | ZHAN Xueping | Chongqing Tongliang District Agricultural and Rural Committee, Chongqing 401120, China | | | CHEN Jing | Chongqing Academy of Agricultural Sciences, Chongqing 401329, China | | | CHEN Xinping | College of Resources and Environment, Southwest University, Chongqing 400716, China
Southwest University Yangtze River Economic Belt Agricultural Green Development Research Center, Chongqing 400716, China | | | WANG Xiaozhong | College of Resources and Environment, Southwest University, Chongqing 400716, China
Southwest University Yangtze River Economic Belt Agricultural Green Development Research Center, Chongqing 400716, China | wxz20181707@swu.edu.cn |
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| Abstract: |
| Southwest China is one of the dominant production area of vegetables in China. However, the problems of high fertilizer input and unbalanced nutrient distribution ratio in intensive vegetable production in this area lead to high nutrient loss, low fertilizer utilization efficiency, and high environmental costs. It is urgent to propose optimized nutrient management measures to achieve green and sustainable development of regional vegetable production. Therefore, in this study, five different fertilizer management strategies were established in a field trial with cabbage in Southwest China：no fertilization（CK）, farmer's fertilizer practice（FP）, optimized nutrient crop-specific fertilizer（OPT1）, controlled release formulated fertilizer（OPT2）, and stabilized formulated fertilizer with nitrification inhibitors（OPT3）. Life cycle assessment method was used to reveal the combined effects of different novel fertilizers on the agronomic, fertilizer, and environmental effects of cabbage. The results showed that compared with FP, optimized fertilization management combined with different new fertilizer products（slow/controlled release fertilizer and stable fertilizer）increased the total cabbage yield by 2.51%-7.53%, improved the nitrogen use efficiency by 168.7%-228.6%, and enhanced the crop nitrogen accumulation by 15.4%-35.3%, while reducing nitrogen, phosphorus, and potassium fertilizer application by an average of 36.9%, 65.2%, and 62.1%, respectively. They also decreased reactive nitrogen losses per area and greenhouse gas emissions by 66.7%-85.9% and 26.3%-27.2%, respectively. Additionally, they increased the net economic benefit and net ecosystem economic benefit by 13.0%-18.4% and 14.5%-31.7%, respectively. Furthermore, compared with the crop -specific fertilizer treatment（OPT1）and the slow / controlled formulated fertilizer treatment（OPT2）, the stabilized formulated fertilizer treatment（OPT3）increased total cabbage yield by 3.1% and 4.6%, enhanced crop nitrogen accumulation at harvest by 13.5% and 17.3%, reduced reactive nitrogen losses per area by 28.9% and 57.9%, and respectively increased net ecosystem economic benefits by 15.0% and 9.5%. In summary, optimized fertilization in combination with nitrification inhibitor treatment（OPT3）showed the best overall effects. The results of this study are of great significance for achieving environmentally friendly vegetable production in Southwest China. |
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