作 者：
焦念元;李吉明;汪江涛;李增嘉;李友军;付国占
单 位：
山东农业大学农学院/作物生物学国家重点实验室;河南科技大学农学院
关键词：
玉米花生间作;氮代谢;蛋白质含量;蛋白质产量;氮磷
摘 要：
探明氮、磷对玉米(Zea mays L.)、花生(Arachis hypogaea)间作体系中作物蛋白质品质和功能叶片氮代谢的影响特点,对改善间作玉米和间作花生蛋白质品质具有重要意义。研究了不同氮磷水平条件下,玉米花生间作对玉米和花生功能叶的硝酸还原酶(NR)、谷氨酰胺合成酶(GS)、内肽酶(EP)及羧肽酶(CP)等酶的活性和子粒蛋白质含量及产量的影响。结果表明:玉米花生间作提高了玉米功能叶的NR、GS和EP的活性,增强了花生(荚果膨大期和饱果期)功能叶的NR和GS活性,降低了EP和CP活性,增施氮肥有利于间作玉米和间作花生功能叶NR和GS活性的提高,高氮水平增施磷肥有利于提高NR和GS的活性;间作提高了玉米子粒、花生果仁的蛋白质含量,间作体系蛋白质总产量分别比单作玉米和单作花生高出16.2%~20.5%和30.7%~55.8%,蛋白质产量当量比(PLER)>1,具有明显的蛋白质产量间作优势;增施氮肥、磷肥有利于提高间作玉米、间作花生蛋白质产量。这表明玉米花生间作促进玉米、花生蛋白质合成和玉米叶器官中氮营养的再运转,提高间作体系蛋白质产量,增施氮肥显著提高间作体系蛋白质产量。
译 名：
Effects of Nitrogen and Phosphorus on Protein and Nitrogen Metabolism Characteristics in Maize Peanut Intercropping System
作 者：
Jiao Nianyuan;Li Jiming;Wang Jiangtao;Li Zengjia;Li Youjun;Fu Guozhan;College of Agronomy,Henan University of Science & Technology;College of Agronomy,Shandong Agricultural University / The State Key Laboratory of Crop Biology;Yaoqiang Subdistrict Office of Licheng District in Jinan;
关键词：
Maize peanut intercropping;;Nitrogen metabolism;;Protein content;;Protein yield;;Nitrogen and phosphorus
摘 要：
Our objective was to determine effects of nitrogen and phosphorus on the protein and characteristic of nitrogen metabolism in functional leaves of crops in maize peanut intercropping system,which is of great significance to improve the protein quality of intercropped maize and intercropped peanut. The activity of nitrate reductase,glutamine synthetase,endopetidase,and carboxypetidase,and the content and yield of seed protein were studied under different nitrogen and phosphorus level. Results showed that the activity of NR,GS,and EP were higher in functional leaves of intercropped maize plant than in those of sole cropped maize plant. There were higher activities of NR and GS during pod developing period and full-pod period,but lower activities of EP and CP in the functional leaves of intercropped peanut plants than in those of sole cropped peanut plants. Increasing application of nitrogen fertilizer was benefit to increasing the activity of NR and GS in functional leaves of intercropped maize plant and intercropped peanut plant,and increasing application of phosphate fertilizer was benefit to improving NR and GS in functional leaves of intercropped maize plant and intercropped peanut plant under high nitrogen level. There were higher values of protein content in seed of intercropped maize plant and intercropped peanut plant than in those of sole cropped maize plant and sole cropped peanut plant,respectively. The total protein yield of maize peanut intercropping system was higher than this of sole cropped maize and sole cropped peanut by 16. 2%- 20. 5% and30. 7%- 55. 8%,respectively. The values of protein yield equivalent ratio( PLER) was greater that 1,which showed that these was obvious protein production advantage in maize peanut intercropping system. Increasing application of nitrogen fertilizer or phosphate fertilizer was beneficial to increase the protein yield of intercropped maize and intercropped peanut. It suggested that the increasing of protein yield of maize peanut intercropping system was due to the improving of protein synthesis and the improving of translocation nitrogen in leaves of maize by maize peanut intercropping. Increasing application of nitrogen fertilizer could significantly improve the total protein yield of maize peanut intercropping system.
