中国生态农业学报2017，Vol.25Issue(12)：1815-1822,8.DOI:10.13930/j.cnki.cjea.170420
不同施肥方法对双季稻区水稻产量及氮素流失的影响
Effects of different fertilization modes on rice yield and nitrogen loss in paddy soils under double cropping rice
摘要
Abstract
To ensure food security, there has been an extravagant use of nitrogen (N) fertilizer in paddy fields. Both the increase in N fertilizer efficiency and reduce in N loss in paddy soils are important in agricultural management and environmental protection. Here, we investigated the effects of side bar fertilization on paddy yields, N use efficiency and N loss in paddy soils and to provide refer-ence for improvement of rice N utilization. Six fertilization treatments were used in the study ― control (T1), common fertilizers with conventional fertilization method (T2, N 280 kg·hm-2, P2O5165 kg·hm-2, K2O 120 kg·hm-2), slow-release fertilizer with con-ventional fertilization method (T3, N 230 kg·hm-2, P2O5165 kg·hm-2, K2O 120 kg·hm-2), high slow-release fertilizer plus side bar application (T4, 230 kg·hm-2, P2O5138 kg·hm-2, K2O 120 kg·hm-2), medium slow-release fertilizer plus side bar application (T5, N 180 kg·hm-2, P2O5123 kg·hm-2, K2O 120 kg·hm-2) and low slow-release fertilizer plus side bar application (T6, N 140 kg·hm-2, P2O5 123 kg·hm-2, K2O 120 kg·hm-2). The study was done in one cropping calendar at the Agricultural Environmental Sciences Observa-tion Station in Yueyang City, Hunan Province, China. The results showed that combined application of slow release N fertilizer and side bar application method increased rice yield, promoted N utilization rate and reduced N loss in paddy fields. Particularly for T4, yields of both early and late rice increased respectively by 13.17% and 4.72%, and decreased rice planting density and applied N amount, compared with T2. The yields of both early and late rice under T4 treatment were 7.27% and 1.74% higher, respectively, than that of T3 treatment. Side bar fertilization significantly reduced N loss by 0.466–0.673 kg(N)?hm-2due to surface runoff de-creasing by 3.54%–29.36%, compared with T2 treatment. Side bar fertilization significantly increased N use efficiency. N use effi-ciency under T4 treatment was 1.70 and 1.22 times that of T2 and T3 treatments, respectively. High slow-release fertilizer plus side bar application was the best fertilization mode in the study area. Our results were beneficial for improving productivity efficiency in agricultural, resources and environmental protection.关键词
水稻/控释肥/侧条施肥/氮肥利用率/氮流失/面源损失率/洞庭湖Key words
Rice/Slow release fertilizer/Side bar fertilization/Nitrogen use efficiency/Nitrogen loss/Surface source loss rate/Dongting Lake分类
农业科学引用本文复制引用
段然,汤月丰,王亚男,王伟政,白玲玉,吴翠霞,文炯,曾希柏..不同施肥方法对双季稻区水稻产量及氮素流失的影响[J].中国生态农业学报,2017,25(12):1815-1822,8.基金项目
国家重点研发计划课题(2016YFD0300902)资助 This study was supported by the National Key R&D Project of China (2016YFD0300902). （2016YFD0300902）
