[Objectives] In maize and peanut intercropping system, foliar spray of ethephon will reduce the plant height of maize, enhance the yield of peanut and the intercropping system. In this paper, the effect of phospharous application on the goodness of chemical regulation was further studied.[Methods]A field experiment was conducted from 2012 to 2013 in the farm of Henan University of Science and Technology. The experiment included 4 planting models: monocultured maize, monocultured peanut, maize and peanut intercropping with ethephon foliar spray, and maize and peanut intercropping without ethephon foliar spray, with or without the application of P fertilizer. The N content, accumulation and distribution in different organs of intercropped maize and peanut were determined, and the yield were investigated.[Results]Compared with monoculture, maize and peanut intercropping significantly enhanced the N content in stems, leaves and seeds of intercropped maize and peanut, increased the N accumulation of intercropped maize, and promoted N allocation to grain of intercropped maize, but reduced N accumulation and allocation to nuts of intercropped peanut. N absorption of maize and peanut intercropping system was higher than that of monocultured maize or peanut, N intercropped advantage was N 26.88–42.21 kg/hm2. Compared with no ethephon foliar spray, spraying ethephon decreased N competition ratio of maize to peanut, reduced the N content and accumulation in stems, leaves and seeds of intercropped maize, enhanced N allocation in grain of intercropped maize, and increased the N content and accumulation in stems, leaves and nuts of intercropped peanut, N distribution to nuts of intercropped peanut was promoted. N absorption of intercropped peanut and N absorption intercropped advantage were enhanced by 23.67%–49.54% (P < 0.05) and 4.95%–54.65%, respectively. Compared with no P fertilizer application, P fertilizer promoted the absorption of N in maize and peanut in the intercropping system with spraying ethephon to maize, with the N absorption enhanced by 19.49%–27.71% and 34.26%–43.24%(P < 0.05), respectively, and intercropping advantage in N absorption was increased by 69.97%–162.57%(P < 0.05).[Conclusions]Foliar spraying ethephon could decrease N competition ratio of maize to peanut, promote the N absorption of maize and peanut intercropping system and N distribution to seed, improve N absorption intercropping advantage, and promote the efficient utilization of nitrogen. P fertilizer application further strengthen the good effects of spraying ethephon.%【目的】在玉米//花生间作体系中，喷施乙烯利明显降低玉米株高，提高花生和间作体系的产量，研究施用乙烯利和磷肥对玉米花生间作氮吸收分配和间作优势的影响，明确其调控机理，对实现玉米、花生间作高产高效具有重要指导意义。【方法】本试验于2012～2013年在河南科技大学农场进行，设玉米单作、花生单作、玉米//花生间作和玉米//花生间作+喷施乙烯利4种种植方式，分别施磷和不施磷，共8个处理，分析了不同处理玉米、花生不同器官氮含量及氮积累量，讨论了喷施乙烯利和施磷对间作体系氮吸收间作优势的影响。【结果】与单作相比，玉米花生间作显著提高了玉米茎、叶、籽粒的氮含量和氮积累量，促进了氮向籽粒的分配；提高了花生茎、叶、果仁的氮含量，但明显降低了花生氮积累量，不利于氮向果仁分配；与单作体系相比，间作体系的氮吸收间作优势为 N 26.88～42.21 kg/hm2。喷施乙烯利减少了玉米对花生的氮竞争比率，降低了间作玉米茎、叶、籽粒的氮含量和氮积累量，促进氮向籽粒的分配，并且还提高了间作花生茎、叶、果仁的氮含量和氮积累量，促进氮向果仁的分配，间作花生的氮吸收量提高23.67%～49.54%(P <0.05)，间作体系氮吸收间作优势提高4.95%～54.65%。与不施磷相比，施磷提高了喷施乙烯利间作体系中玉米和花生吸氮量，分别提高19.49%～27.71%和34.26%～43.24%(P <0.05)，氮吸收间作优势提高69.97%～162.57%(P <0.05)。【结论】施用磷肥可进一步提升喷施乙烯利在降低玉米对花生的氮竞争比率，促进玉米花生间作体系氮吸收及氮向籽粒中分配，提高氮吸收间作优势的作用，促进氮素的高效利用。
展开▼
