Bu Rong-Yan, Li Min, Han Shang, Cheng Wen-Long, Wang Hui, Sun Zhi-Xiang, Tang Shan, Wu Ji
Institute of Soil and Fertilizer, Anhui Academy of Agricultural Sciences/Key Laboratory of Nutrient Cycling and Resource Environment of Anhui Province, Hefei 230031, China.
College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China.
Ying Yong Sheng Tai Xue Bao. 2021 Jan;32(1):145-153. doi: 10.13287/j.1001-9332.202101.023.
We carried out a 3-year field experiment with three treatments: 1) no fertilizer application (CK), 2) chemical fertilizer application (F), and 3) combined organic and chemical fertilizer (FM) in which the total nitrogen inputs were equal with F (organic fertilizer applied in the early rice season). We evaluated the variations of crop yield, CH and NO emission, and soil nutrient. The results showed that fertilizer application could increase rice yield in both early and late rice seasons. Compared with F treatment, FM treatment increased rice yield by 5.6% and 7.2% for early and late rice, respectively. The enhancement of yield was positively correlated with years. Compared with F treatment, CH emission in early rice season, late rice season and whole year in the field in FM treatment was increased by 8.2%, 4.8% and 6.7%, respectively, while the NO emission was deceased by 31.4%, 5.0% and 18.8%, respectively. Organic fertilizer application reduced the greenhouse gas intensity (GHGI) by 6.8% and 8.5%, but there was no significant differences in global warming potential (GWP) across treatments in 2018 and 2019. Compared with F treatment, the content of organic matter, total nitrogen, available phosphorus and available potassium were increased by 9.7%, 4.1%, 30.9% and 2.5%, respectively. Overall, our results suggested FM application in early rice season is an effective measure to increase crop yield, improve soil nutrient, and reduce GHGI.
我们进行了一项为期3年的田间试验，设置了三种处理：1）不施肥（CK）；2）施用化肥（F）；3）有机肥料与化肥配施（FM），其中总氮投入量与F处理相等（有机肥在早稻季施用）。我们评估了作物产量、CH和NO排放以及土壤养分的变化。结果表明，施肥可提高早稻季和晚稻季的水稻产量。与F处理相比，FM处理早稻和晚稻产量分别提高了5.6%和7.2%。产量的提高与年份呈正相关。与F处理相比，FM处理早稻季、晚稻季及田间全年的CH排放分别增加了8.2%、4.8%和6.7%，而NO排放分别减少了31.4%、5.0%和18.8%。施用有机肥使温室气体强度（GHGI）降低了6.8%和8.5%，但2018年和2019年各处理间全球变暖潜势（GWP）无显著差异。与F处理相比，有机质、全氮、有效磷和速效钾含量分别增加了9.7%、4.1%、30.9%和2.5%。总体而言，我们的结果表明早稻季施用FM是提高作物产量、改善土壤养分和降低GHGI的有效措施。
