栽插密度对节水抗旱稻旱优73产量及构成要素的影响OA

To investigate the effects of planting density on the yield and component factors of the water-saving and drought-resistant rice Hanyou 73,4 planting density treatments were set up:treatment A(plant spacing of 30 cm×12 cm,with 2-3 seedlings per hill),treatment B(plant spacing of 30 cm×14 cm,with 3-4 seedlings per hill),treatment C(CK,plant spacing of 30 cm×18 cm,with 4-5 seedlings per hill),and treatment D(plant spacing of 25 cm×12 cm,with 2 seedlings per hill).The yield and its component factors of each treatment were measured.The results showed that the highest number of effective panicles was observed in treatment A(157 500 panicles/667 m2),which was 10.9%higher than that of CK.The total number of grains per spike for treatments A,B,and D ranged from 138.4 to 146.3,a decrease of 3.9 to 11.8 grains compared to CK.Only small differences in seed setting rate(84.0%-85.2%)and 1 000-grain weight(26.6-27.1 g)were observed among treatments.The highest yield was obtained in treatment A(612.5 kg/667 m2),followed by treatment D(605.6 kg/667 m2),which were increased by 9.2%and 8.0%,respectively,compared to the CK.In conclusion,under the conditions of this experiment,a planting density of 30 cm×12 cm with 2-3 seedlings per hill was identified as a suitable planting density for Hanyou 73.This paper provides a reference for the promotion and cultivation of Hanyou 73.