Mechanisms Of Nitrogen Competition And Utilization In Relay Intercropping Systems Of Wheat, Peanut And Maize And Its Effects On Yield And Quality

In order to learn the nitrogen competition and utilization in different inter-planting and relay-planting systems of wheat, peanut and maize and its effects on yield and quality and their mechanisms under different field experiment and physiological & biochemical tests were carried out from 2004 to 2005. The results were as follows:1 High yield of different inter-planting and relay-planting systems of wheat, peanut and maizeCompared with multiple cropping of wheat with peanut, the LER of Iwpm2:4,Iwpm2:6 was 1.4578,1.3620 respectively;Compared with multiple cropping of wheat with maize, the LER of Iwpm2:6,Iwpm2:8 was 1.1299,1.1574。In general, the average of LER of Iwpm2:6 was 1.2460, which could raise the soil use efficiency by 24.60%, had obvious relay intercropping advantages.2 Nitrogen competition and utilization in different inter-planting and relay-planting systems of wheat, peanut and maize and its effects on yield and quality2.1 Difference of nitrogen competition and utilization in inter-planting and relay-planting systemThe nitrogen content of wheat with space 60cm was highest, those of wheat with space 40cm were middle, those of sole wheat were lowest. The treatment Iwpm2:6 of inter-planting system was best,while Iwpm2:2 of inter-planting system was worst. Due to the same nitrogen fertilization quantity, the higher nitrogen content were, the higher the nitrogen transferred from peanut and nitrogen utilization efficiency will be.