为研究筛选甘肃河西地区浅埋滴灌条件下春小麦最佳播种量，以宁春4号为试材，研究了不同播种量对浅埋滴灌条件下春小麦产量构成、农艺性状及产量的影响。结果表明，在浅埋滴灌宽幅匀播栽培条件下，随着播种量的增加春小麦的株高也随之逐渐提高，穗长和穗粒数随播种量增加均呈先增后降趋势。春小麦播种量为675万粒/hm2时，穗长最长，为8.02 cm；穗粒数最多，为38.05粒；千粒重也较高，为39.4 g；折合产量最高，为8 175.0 kg/hm2，且均显著或极显著高于其余处理。建议在甘肃河西地区春小麦浅埋滴灌宽幅匀播栽培中播种量以675万粒/hm2为宜。

To study and screen the optimal sowing amount of spring wheat under shallow buried drip irrigation conditions in the Hexi region of Gansu Province, the effects of different sowing rates on wheat yield composition, agronomic traits, and yield were studied using Ningchun 4 as the experimental material. The results showed that under shallow buried drip irrigation condition, with the increase of planting density, the plant height of wheat increased, and the spike length and number of grains per spike both showed a trend of increasing first and then decreasing with the increase of sowing amount. The maximum spike length and number of grains per spike were 8.02 cm and 38.05 grains per spike, respectively under the sowing rate of 6.75 million grains/ha which also yielded higher 1000-grain weight of 39.4 g and the highest average yield of 8 175.0 kg/ha, which was significantly higher than other treatments. Based on comprehensive analysis, the recommended wheat sowing rate for the promotion of shallow buried drip irrigation and wide range uniform sowing technology in the Hexi region of Gansu is about 6.75 million grains/ha.

S512.1

甘肃省2022年基层农机推广体系改革与建设补助项目(甘农财发〔2022〕34号)。