甘肃河西灌区不同青贮玉米品种经济性状研究

引进试种了专用青贮玉米品种中原单32号、科多4号、迪卡656、沈单16号、中单16号等5个品种,其中中原单32号、科多4号、迪卡656三个品种鲜草产量在6.5 t/666.7 m2以上,可在河西灌区大力推广;通过密度试验表明,中原单32号在河西灌区的适宜密度为4 500~5 500株/666.7 m2,密度过大不仅影响产草量,也影响品质,密度过小产草量降低;试验结果还表明,适宜的收割期应在乳熟后~蜡熟前,此时产草量,营养物质总量已达最大值,此期也是青贮原料品质最佳的时期。在此阶段,选择晴好的天气,及时收割,抓紧青贮。

Study on Growth Performance of Silage Corn in Hexi lrrigatde Area of Gansu Prouince

Five special- purpose silage com varieties （Zhong Yuan Dan No. 32, Ke Duo No. 4, Di Ka 656, Shen Dan No. 16, Zhong Dan No. 16） were introduced and planted. The results showed that yield of fresh forage of Zhong Yuan Dan No. 32, Ke Duo No. 4 and Di Ka 656 exceeded 6.5 t/666.7 m2 , and can be popularized in Hexi Irrigated Area. Density experiment indicated proper- density of Zhong Yuan Dan No. 32 was 4500 - 5500 strain/666.7 m2, greater density influenced forage production and quality, less density led to lower forage production. Proper harvesting time should between milky stage and waxen maturity, because the forage pro - duction and total nutrient was the maximum during this period, it was also the best time of silage material quality. During this period, it is time to harvest and silage.