施氮量和栽插密度对桂育11号产量和稻米品质的影响

为探讨施氮量和栽插密度对水稻产量和稻米品质的影响,以水稻优质常规种桂育11号为试验材料,采用裂区试验设计,设置施氮量(主区)分别为0(N1)、75(N2)、150(N3)、225(N4) kg·hm-2,栽插密度(裂区)分别为27(D1)、30(D2)、33(D3)万蔸·hm-2,测定不同施氮量和栽插密度下桂育11号的...

Influences of Nitrogen Fertilizer Application Rate and Planting Density on the Yield and Rice Quality of Guiyu 11

In order to investigate the effects of nitrogen application rate and planting density on the rice yield and quality under the field conditions, Guiyu 11, a high-quality conventional variety, was as experiment material and split-piot experiment was set, which the nitrogen application rates (N) were used as the main plot including 0 (N1), 75 (N2), 150 (N3), 225 (N4) kg·hm^-2 and the planting density (D) was used as split block including 27×10⁴ (D1), 30×10⁴ (D2), 33×10⁴(D3) hills·hm^-2. The traits of yield and quality were measured. The results showed that nitrogen application rate had extremely significant effects on effective panicle number, 1 000-grain weight, yield, head rice rate, chalkiness rate, chalkiness degree and protein content; while planting density had extremely significant effects on effective panicle number, yield, brown rice rate, chalkiness degree and head rice rate; and the interaction of N×D had significant effects on seed-setting rate, chalkiness rate and chalkiness degree. The grains number per panicle, seed setting rate and yield were highest with 150 kg·hm^-2 nitrogen application rate. The effective panicle number and yield were highest with 30×10⁴ hills·hm-2. Under nitrogen-density interaction, the performances of yield and quality under N3D2, N3D1 and N4D2 treatments were not significantly different with the highest values of yield and quality traits. In summary, 150 kg·hm^-2 and 30×10⁴ hills·hm^-2 were recommended as the suitable nitrogen application rate and planting density of Guiyu 11, which provided a theoretical basis for scientifically formulating high-yield, high-efficiency and high-quality cultivation techniques of Guiyu 11.