在中国东北旱地农业系统中，地膜覆盖提高了玉米产量、水分利用效率和氮素利用效率。
Plastic Film Mulching Improved Maize Yield, Water Use Efficiency, and N Use Efficiency under Dryland Farming System in Northeast China.
作者信息
Hossain Md Elias, Zhang Zhe, Dong Wenyi, Wang Shangwen, Liu Meixia, Liu Enke, Mei Xurong
机构信息
Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
Key Laboratory of Dryland Agriculture, Ministry of Agriculture of the People's Republic of China (MOA), Beijing 100081, China.
出版信息
Plants (Basel). 2022 Jun 28;11(13):1710. doi: 10.3390/plants11131710.
This 2-year field study analyzed plastic film mulching (PFM) effects on nitrogen use efficiency (NUE), and soil N pools under rainfed dryland conditions. Compared to no-mulching (NM, control), maize yields under PFM were increased by 36.3% (2515.7 kg ha−1) and 23.9% (1656.1 kg ha−1) in the 2020 and 2021 growing seasons, respectively. The PFM improved (p < 0.01) the water use efficiency (WUE) of maize by 39.6% and 33.8% in the 2020 and 2021 growing seasons, respectively. The 2-year average NUE of maize under the PFM was 40.1, which was 30.1% greater than the NM. The average soil total N, particulate organic N, and microbial biomass N contents under the PFM soil profile were increased by 22.3%, 51.9%, and 35%, respectively, over the two growing seasons. The residual 15N content (%TN) in soil total N pool was significantly higher (p < 0.05) under the PFM treatment. Our results suggest that PFM could increase maize productivity and sustainability of rainfed dryland faming systems by improving WUE, NUE, and soil N pools.
这项为期两年的田间研究分析了雨养旱地条件下塑料薄膜覆盖（PFM）对氮素利用效率（NUE）和土壤氮库的影响。与不覆盖（NM，对照）相比，2020年和2021年生长季，PFM处理下玉米产量分别提高了36.3%（2515.7公斤/公顷）和23.9%（1656.1公斤/公顷）。PFM分别在2020年和2021年生长季将玉米水分利用效率（WUE）提高了39.6%和33.8%（p<0.01）。PFM处理下玉米两年平均NUE为40.1，比NM高30.1%。在两个生长季中，PFM土壤剖面下的土壤总氮、颗粒有机氮和微生物生物量氮平均含量分别增加了22.3%、51.9%和35%。PFM处理下土壤总氮库中的残留15N含量（%TN）显著更高（p<0.05）。我们的结果表明，PFM可以通过提高WUE、NUE和土壤氮库来提高雨养旱地耕作系统的玉米生产力和可持续性。
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