Zhu Linxing, Liang Aichen, Wang Rongfeng, Shi Yaman, Li Jia, Wang RuiRui, Wang Min, Guo Shiwei
Jiangsu Provincial Key Lab for Organic Solid Waste Utilization, National Engineering Research Center for Organic-based Fertilizers, Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, Nanjing, China.
Front Plant Sci. 2023 Jul 17;14:1190929. doi: 10.3389/fpls.2023.1190929. eCollection 2023.
In achieving food security and sustainable agricultural development, improving and maintaining soil health is considered as a key driving factor. The improvement based on different forms of nitrogen fertilization has aroused great public interest in improving and restoring monocropping obstacles for specific soil problems.
For this, a short-term cucumber cropping field experiment was conducted in the subtropical region of China under four fertilization treatments: ammonium (AN), nitrate (NN), ammonium with dicyandiamide (AN+DCD), nitrate with dicyandiamide (NN+DCD). In this study, we measured the effects of nitrogen forms addition on plant productivity and soil health in a monocropping system over seven seasons.
To systematically evaluate soil health, a wide range of soil environmental factors were measured and incorporated into the soil health index (SHI) by entropy method. Compared with ammonium treatment (SHI = 0.059, SHI = 0.081), the positive effect of nitrate was mainly reflected in improving soil health (SHI = 0.097, SHI = 0.094), which was positively correlated with the increase in plant productivity of cucumber after seven seasons of monocropping. The most critical factor affecting SHI is soil ammonium nitrogen content, which was negatively correlated with plant productivity.
Nitrate promotes soil health and plant productivity by optimizing soil environmental factors. The study thus emphasized the necessity of nitrate input for the sustenance of soil-crop ecosystems, with the consequent possibility of application of the results in planning monoculture obstacle prevention and management measures.
在实现粮食安全和可持续农业发展过程中，改善和维持土壤健康被视为关键驱动因素。基于不同形式氮肥的改良已引起公众对改善和修复特定土壤问题的单作障碍的极大兴趣。
为此，在中国亚热带地区进行了一项短期黄瓜种植田间试验，设置了四种施肥处理：铵态氮肥（AN）、硝态氮肥（NN）、添加双氰胺的铵态氮肥（AN+DCD）、添加双氰胺的硝态氮肥（NN+DCD）。本研究在七个种植季中测量了单作系统中添加不同形态氮素对植物生产力和土壤健康的影响。
为系统评估土壤健康状况，测定了一系列土壤环境因子，并通过熵权法将其纳入土壤健康指数（SHI）。与铵态氮肥处理（SHI = 0.059，SHI = 0.081）相比，硝态氮肥的积极作用主要体现在改善土壤健康（SHI = 0.097，SHI = 0.094），这与单作七个种植季后黄瓜植物生产力的提高呈正相关。影响土壤健康指数的最关键因素是土壤铵态氮含量，它与植物生产力呈负相关。
硝态氮肥通过优化土壤环境因子促进土壤健康和植物生产力。该研究因此强调了硝态氮输入对维持土壤 - 作物生态系统的必要性，结果有可能应用于规划单作障碍预防和管理措施。
