关键词: 保障, 保障

Abstract: In order to determine the suitable sowing of wheat, and technology to support and theoretical basis for the Yubei vigorously the development of high quality wheat production. Analysis using EXCEL software and other mathematical statistical methods, the Yubei different quality wheat varieties yield structure of the different sowing dates. The results indicated that, the variety rule of ‘Hebei-8901’ was the steadiest, which was to say that the variable sowing-time had no much effect on its yield in the last. But the breeds of ‘Zhengmai-9405’ and ‘Zhengmai-9023’ had showed remarkable differences. Experimental study was drawn: sowed earlier and wheat had more time growing stronger, and more quantify of heat accumulated, before the time of winter coming they had the much reasonable colony. From the result of the trial, we had known that, the most suitable sowing-time of wheat with semi-winter feature was in Oct. 5th to 15th like ‘Zhengmai-9023’ with feebleness-spring feature should be postponed 5-7 days accordingly.