Abstract:

Two-factor split-plot design was used in this paper to study the effects of nitrogen application rate and plant density on the yield of the new white large grain and early-maturing wheat variety-Mianmai 47. The results showed that, nitrogen application rate, plant density and their interaction influenced the yield significantly. The yield both increased with the increase of nitrogen application rate and that of plant density. In the same nitrogen application rate, the effective spikes increased, grains per spike decreased and grain weight decreased slightly with the increase of plant densities. In the same plant density, the effective spikes and grains per spike increased, and grain weight changed slightly with the increase of nitrogen application rates. The combination with high relative economic benefits was also obtained. The cultivation measures with high yield and high relative economic benefits of Mianmai 47 were that: the nitrogen application rate were 150-225 kg/hm2 and the basic seedlings were 120×104-240×104 per hm2 .