National Outstanding Agriculture Research Talents Innovation Team, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia, 010019, People's Republic of China.
Inner Mongolia Academy of Agricultural &Animal Husbandry Science, Hohhot, 010010, People's Republic of China.
Sci Rep. 2023 Mar 10;13(1):4018. doi: 10.1038/s41598-022-25845-4.
Ridge-furrow with plastic film mulching and various urea types have been applied in rainfed agriculture, but their interactive effects on potato (Solanum tuberosum L.) yield and especially environments remain poorly understood. A three-year experiment was conducted to explore the responses of tuber yield, methane (CH) and nitrous oxide (NO) emissions, net global warming potential (NGWP), carbon footprint (CF), and net ecosystem economic budget (NEEB) of rainfed potato to two mulching practices [plastic film mulching (RM) and no plastic film mulching (NM)] and three urea types [conventional urea (U), controlled-release urea (C), and a mixture of equal amounts of conventional urea and controlled-release urea at a ratio of 1:1 (CU)] and their interactions. The results showed that RM significantly decreased cumulative NO emissions and CH uptake by 4.9% and 28.4%, but significantly increased NGWP by 8.9% relative to NM. Compared with U, the C and CU produced much lower cumulative NO emissions and NGWP and higher CH uptake. The interaction of mulching methods and urea type had significant influence on tuber yield and NEEB. Considering both environment and production, RMCU could not only achieve a high tuber yield and NEEB (by up to 26.5% and 42.9%, respectively), but also reduce the CF (by up to 13.7%), and therefore should be considered an effective strategy for dryland potato.
垄膜沟灌和不同类型尿素在雨养农业中得到了应用，但它们对马铃薯产量的交互影响，特别是对环境的影响仍知之甚少。本研究进行了为期三年的试验，以探索覆盖方式[塑料薄膜覆盖（RM）和不覆盖（NM）]和三种尿素类型[传统尿素（U）、控释尿素（C）和等比例混合的传统尿素和控释尿素（CU）]对雨养马铃薯块茎产量、甲烷（CH）和氧化亚氮（NO）排放、净全球变暖潜势（NGWP）、碳足迹（CF）和净生态系统经济预算（NEEB）的影响及其交互作用。结果表明，与 NM 相比，RM 显著降低了累积 NO 排放和 CH 吸收，分别减少了 4.9%和 28.4%，但显著增加了 NGWP，增加了 8.9%。与 U 相比，C 和 CU 产生的累积 NO 排放和 NGWP 更低，CH 吸收更高。覆盖方式和尿素类型的相互作用对块茎产量和 NEEB 有显著影响。考虑到环境和生产，RMCU 不仅可以实现高块茎产量和 NEEB（分别高达 26.5%和 42.9%），还可以降低 CF（高达 13.7%），因此被认为是旱地马铃薯的有效策略。
