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- Title
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.
- Authors
马心灵; 朱启林; 耿川雄; 鲁泽刚; 龙光强; 汤利
- 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 N(0 kg-hm-2), N. (125 kg • hm-2), 义(2 5 0 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 %, 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 N0 and N r Yield advantage in intercropping attributed to improvement of nutrient use efficiency at N0 while to increase of nutrient uptake at N" To utilize the yield advantage from nutrient uptake, controlling input of nitrogen fertilizer is necessary in intercropping.
- Publication
Yingyong Shengtai Xuebao, 2017, Vol 28, Issue 4, p1265
- ISSN
1001-9332
- Publication type
Article
- DOI
10.13287/j.1001-9332.201704.026