Long-term impacts of nitrogen fertilization and straw incorporation on rice production and nitrogen recovery efficiency under plastic film mulching cultivation. (20th January 2021)

• Record Type: Journal Article
• Authors: Sun, Yan; Zhu, Mengjie; Mi, Wenhai; Wu, Lianghuan
• Is Part Of: Journal of plant nutrition. Volume 44:Number 2(2021)
• Page Start: 213
• Page End: 227
• Publication Date: 2021-01-20
• Subjects: grain yield -- long-term N application -- optimum strategy -- paddy field -- soil nutrient; Plants -- Nutrition -- Periodicals; Plants -- Effect of minerals on -- Periodicals; Deficiency diseases in plants -- Periodicals; 575.76
• DOI: 10.1080/01904167.2020.1806303
• Languages: English
• ISSNs: 0190-4167

Abstract

Abstract: The application of nitrogen (N) fertilizer as base fertilizer in plastic film mulching cultivation (PFMC) system easily leads to soil N deficiency in the late growth period of rice. The combination of N fertilization and straw incorporation was put forward and their impacts on rice yield and grain N recovery efficiency (NRE) based on a long-term experiment in a PFMC system were evaluated. Five N application levels included 0, 45, 90, 135, and 180 kg ha −1 and two subplots were rice straw removal (RSR) and rice straw incorporation (RSI). Moreover, RSR and RSI in a conventional flooding cultivation (CFC) system with 135 kg ha −1 N application rate were also included. The results showed that the optimum N application rate was 135 kg ha −1 . At this N application level, the promotion effect on yield and grain N uptake over years in PFMC system was more obvious than that in CFC system. Continuous PFMC might accelerate the mineralization of soil organic matter and the increase of soil N availability. However, RSI had no obvious promotion effect on the increment of yield, grain NRE, and soil available N with years compared with RSR in PFMC system. In conclusion, film mulching with the N fertilizer application rate of 135 kg ha −1 improved soil thermal condition in early growth stage of rice, and thus enhanced the availability of soil N, grain N uptake, and yield. This provides a reference for PFMC application in water-saving rice production system.