中国生态农业学报2017，Vol.25Issue(8)：1139-1146,8.DOI:10.13930/j.cnki.cjea.170050
减量施氮与间作模式对甜玉米AMF侵染和大豆结瘤及作物氮磷吸收的影响
Effects of reduced nitrogen application and intercropping on sweet corn AMF colonization, soybean nodulation and nitrogen and phosphorus absorption
摘要
Abstract
In order to explore a sustainable pattern of sweet corn production in South China, a field experiment was carried out in Guangzhou over the period of 4 growing seasons — autumn of 2014, spring and autumn of 2015 and spring of 2016. The study investigated the effects of 2 N fertilizer levels [300 kg.hm-2 (N1, reduced N dose) and 360 kg.hm-2 (N2, conventional N dose)] and 4 planting patterns [sweet corn/vegetable soybean intercropping with 2:3 (S2B3) and 2:4 (S2B4) line ratios, sole sweet corn (SS) and sole soybean (SB)] on yield of sweet corn and soybean, degree of arbuscular mycorrhizal fungi (AMF) colonization of sweet corn and soybean rhizobia. The results showed that the yield of sweet corn under reduced N application and intercropping treatment was significantly higher than that under monoculture. In spring of 2016, nodule number of soy-bean under S2B3-N1 treatment was significantly higher than that under S2B3-N2 treatment. In the 4 seasons of the experiment, dry weight of soybean nodule was not affected by reduced N application and intercropping. In 2015, N content and biomass of sweet corn were significantly higher than those under monoculture, regardless of the N application level. In 2015, AMF infec-tion rate of sweet corn under reduced N-intercropping treatment was significantly higher than that under conventional N treatment. In autumn of 2015, phosphorus content of sweet corn under reduced N and intercropping treatment was significantly higher than that under monoculture. In conclusion, the reduction of N input and intercropping with soybean significantly im-proved N and phosphorus contents, rate of AMF infection, biomass and yield of sweet corn. Intercropping with soybean under reduced chemical N input maintained high yield, increased resource utilization efficiency of sweet corn, and thus it was a practicable pattern for sustainable sweet corn production in southern China.关键词
减量施氮/甜玉米|菜用大豆间作/氮吸收/磷吸收/根瘤菌/丛枝菌根真菌Key words
Reduced nitrogen application/Sweet corn/soybean intercropping/Nitrogen absorption/Phosphorus absorption/Rhizobium/Arbuscular mycorrhizal fungi (AMF)分类
农业科技引用本文复制引用
周贤玉,唐艺玲,王志国,王建武..减量施氮与间作模式对甜玉米AMF侵染和大豆结瘤及作物氮磷吸收的影响[J].中国生态农业学报,2017,25(8):1139-1146,8.基金项目
国家重大基础研究计划(973 计划)项目(2011CB100400)、国家科技支撑计划项目(2012BAD14B16-04)和广东省科技计划项目(2012A020100003)资助 The study was supported by the National Basic Research Program of China (973 Program, 2011CB100400), the National Key Technology R&D Program of China (2012BAD14B16-04) and the Science-technology Project of Guangdong Province (2012A020100003). （973 计划）
