应用生态学报2017，Vol.28Issue(4)：1265-1273,9.DOI:10.13287/j.1001-9332.201704.026
不同氮水平下作物养分吸收与利用对玉米马铃薯间作产量优势的贡献
Contribution of nutrient uptake and utilization on yield advantage in maize and potato intercropping under different nitrogen application rates
摘要
Abstract
Intercropping of maize and potato,as an important intercropping planting pattern,has a prominent advantage of resource utilization and yield.However,contribution of nutrient uptake and utilization to crop yield advantage and its response to N application rates remain unclear.Through a 2-year plot experiment,including maize monoculture,potato monoculture and maize intercropping with potato at 4 N-fertilized levels of N0 (0 kg · hm-2),N1 (125 kg · hm-2),N2 (250 kg · hm-2)and N3 (375 kg · hm-2),nutritional contribution of yield advantage of intercropping was studied.The results showed that weighted average uptake of nitrogen,phosphorus and potassium was gradually increased with N application rate in monocultures,but increase followed by a decrease in intercropping.Compared with monoculture at the same N level,nutrient uptake advantage of intercropping was the highest at N1,which increased nitrogen,phosphorus and potassium uptake by 14.9％,38.6％ and 27.8％,respectively.However,the nutrient use efficiencies were highest in intercropping at N0 and N3 with increment of 3.5％-14.3％ for nitrogen,3.5％-18.5％ for phosphorus and 10.6％-31.6％ for potassium.Maize and potato intercropping had a significant yield advantage at No and N1.Yield advantage in intercropping attributed to improvement of nutrient use efficiency at N0 while to increase of nutrient uptake at N1.To utilize the yield advantage from nutrient uptake,controlling input of nitrogen fertilizer is necessary in intercropping.关键词
玉米与马铃薯间作/养分吸收/养分利用/间作优势Key words
maize and potato intercropping/nutrient uptake/nutrient utilization/intercropping advantage引用本文复制引用
马心灵,朱启林,耿川雄,鲁泽刚,龙光强,汤利..不同氮水平下作物养分吸收与利用对玉米马铃薯间作产量优势的贡献[J].应用生态学报,2017,28(4):1265-1273,9.基金项目
本文由国家自然科学基金项目(41201289,41361065)资助 This work was supported by the Natural Science Foundation of China (41201289,41361065). （41201289,41361065）
