西南林业大学学报2018，Vol.38Issue(1)：72-78,7.DOI:10.11929/j.issn.2095-1914.2018.01.012
不同施氮水平及根系分隔方式对间作小麦蚕豆氮吸收的影响
Effects of Nitrogen Levels and Root Barriers on Nitrogen Absorption of Intercropping Triticum aestivum and Vicia faba
摘要
Abstract
Pot trials of Triticum aestivum and Vicia faba intercrop with 3 root barriers(no barrier,mesh barri-er,polythene barrier) and 3 nitrogen levels(N/2,N,3N/2) were carried out in the greenhouse. Dry matter and the nitrogen absorption and nutrient competition ratio(NCRcs) were analyzed to study the effects of different plant-ing patterns and nitrogen application levels on nitrogen nutrition accumulation and nutrient competition in Triticum aestivum and Vicia faba.The results showed that different nitrogen levels and root barrier altered dry matter of Tritic-um aestivum and Vicia faba,the mesh barrier increased dry matter than no barrier and polythene barrier 60.8%, 61.46%;71.19%,73.42%;63.02%, 61.54% under deficiency, adequate and high nitrogen level (N/2, N, 3N/2) at wheat jointing stage. Under deficiency nitrogen level, dry matter of no barrier Vicia faba decreased by 15.46% and 20.68% than that of mesh and polythene barrier. Under recommended nitrogen application rate, dry matter of mesh barrier decreased by 24.53%,23.11% and 26.66%,26.96% than that no barrier and polythene barrier at heading stage and maturity stage of Vicia faba. However,there were no significantly differences among all 3 root barriers under high nitrogen level.Different nitrogen levels and root barriers also altered nitrogen absorption of Triticum aestivum and Vicia faba. Under deficiency nitrogen condition, the nitrogen absorption of no barrier wheat were significantly higher than those of mesh and polythene barrier,but this advantage was not obvious with the in-creasing of nitrogen application rate. Under the conditions of deficiency and high nitrogen, there were not signifi-cantly differences of Vicia faba in the nitrogen absorption among 3 root systems (PB,MB, NB), however, under the recommendation of nitrogen application, nitrogen absorption of polythene barrier Vicia faba increased sharply, especially in the grain expansion stage, which increased by 29.03% and 26.48% respectively compared with the no barrier and mesh barrier.Under deficiency and adequate nitrogen application rates,the nutrient competition ratio (NCRcs) of wheat was dominant relative to Vicia faba between mesh barrier and polythene barrier system and be-tween no barrier and polythene barrier system at jointing,booting and filling stages of Triticum aestivum.关键词
小麦/蚕豆/根系分隔/干物质量/氮积累量/养分竞争比率Key words
Triticum aestivum/Vicia faba/root barriers/dry matter/nitrogen accumulation/nutrient compe-tition ratio分类
农业科技引用本文复制引用
刘英超,肖靖秀,郑毅,汤利..不同施氮水平及根系分隔方式对间作小麦蚕豆氮吸收的影响[J].西南林业大学学报,2018,38(1):72-78,7.基金项目
国家自然科学基金项目(31460551、31260504)资助 （31460551、31260504）
云南省研究生学术新人奖资助. （）
