PDF(Pubmed)
Abstract：
UNASSIGNED: 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.
UNASSIGNED: 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.
UNASSIGNED: 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 (SHIAN = 0.059, SHIAN+DCD = 0.081), the positive effect of nitrate was mainly reflected in improving soil health (SHINN = 0.097, SHINN+DCD = 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.
UNASSIGNED: 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.
UNASSIGNED: 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.
UNASSIGNED: 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 (SHIAN = 0.059, SHIAN+DCD = 0.081), the positive effect of nitrate was mainly reflected in improving soil health (SHINN = 0.097, SHINN+DCD = 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.
UNASSIGNED: 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.
摘要：
■在实现粮食安全和可持续农业发展方面，改善和保持土壤健康被认为是一个关键的驱动因素。基于不同形式的氮肥的改善引起了公众对改善和恢复针对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短期黄瓜田间试验，四种施肥处理：铵（AN），硝酸盐（NN），铵与双氯胺（AN+DCD），硝酸盐与双氰基胺（NN+DCD）。在这项研究中,我们在七个季节的单作系统中测量了氮形式添加对植物生产力和土壤健康的影响。
■为了系统地评估土壤健康，通过熵值法测量了广泛的土壤环境因子并将其纳入土壤健康指数（SHI）。与铵处理(石安=0.059，石安+DCD=0.081)相比，硝酸盐的积极作用主要体现在改善土壤健康(SHINN=0.097,SHINN+DCD=0.094),与单作七个季节后黄瓜植株生产力的提高呈正相关。影响SHI的最关键因素是土壤铵态氮含量，与植物生产力呈负相关。
■硝酸盐通过优化土壤环境因子促进土壤健康和植物生产力。因此，该研究强调了硝酸盐输入对土壤-作物生态系统的维持的必要性，结果有可能在规划单一文化障碍预防和管理措施中应用。
■为此，在中国亚热带地区进行了短期黄瓜田间试验，四种施肥处理：铵（AN），硝酸盐（NN），铵与双氯胺（AN+DCD），硝酸盐与双氰基胺（NN+DCD）。在这项研究中,我们在七个季节的单作系统中测量了氮形式添加对植物生产力和土壤健康的影响。
■为了系统地评估土壤健康，通过熵值法测量了广泛的土壤环境因子并将其纳入土壤健康指数（SHI）。与铵处理(石安=0.059，石安+DCD=0.081)相比，硝酸盐的积极作用主要体现在改善土壤健康(SHINN=0.097,SHINN+DCD=0.094),与单作七个季节后黄瓜植株生产力的提高呈正相关。影响SHI的最关键因素是土壤铵态氮含量，与植物生产力呈负相关。
■硝酸盐通过优化土壤环境因子促进土壤健康和植物生产力。因此，该研究强调了硝酸盐输入对土壤-作物生态系统的维持的必要性，结果有可能在规划单一文化障碍预防和管理措施中应用。
