| Autor: |
Ma XL; College of Resources and Environment,Yunnan Agricultural University, Kunming 650201, China., Zhu QL; College of Resources and Environment,Yunnan Agricultural University, Kunming 650201, China., Geng CX; College of Resources and Environment,Yunnan Agricultural University, Kunming 650201, China., Lu ZG; College of Resources and Environment,Yunnan Agricultural University, Kunming 650201, China., Long GQ; College of Resources and Environment,Yunnan Agricultural University, Kunming 650201, China., Tang L; College of Resources and Environment,Yunnan Agricultural University, Kunming 650201, China. |
| Jazyk: |
čínština |
| Zdroj: |
Ying yong sheng tai xue bao = The journal of applied ecology [Ying Yong Sheng Tai Xue Bao] 2017 Apr 18; Vol. 28 (4), pp. 1265-1273. |
| DOI: |
10.13287/j.1001-9332.201704.026 |
| Abstrakt: |
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 (0 kg·hm -2 ), N 1 (125 kg·hm -2 ), N 2 (250 kg·hm -2 ) and N 3 (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 N 1 , 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 N 0 and N 3 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 N 0 and N 1 . Yield advantage in intercropping attributed to improvement of nutrient use efficiency at N 0 while to increase of nutrient uptake at N 1 . To utilize the yield advantage from nutrient uptake, controlling input of nitrogen fertilizer is necessary in intercropping. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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