东北农牧交错带玉米适宜收获方式的研究(Ⅲ)

Zey mays appropriate harvesting approach in ecotone between agriculture and animal husbandry in northeast China

农牧交错地区普遍存在草畜矛盾,从增加农牧交错地区饲料来源的角度出发,尝试了改变当地玉米传统的收获方式,采用剪去植株顶端的收获方式。试验结果表明,剪去玉米植株顶端,导致玉米籽粒产量及千粒重下降,籽粒的总淀粉及粗蛋白含量下降;所剪的玉米植株顶端与对照比较,粗蛋白含量上升,粗纤维含量下降,因此饲用价值提高;在适当时间剪去玉米植株顶端的收获方式,在农牧交错地区具有可行性。

There is serious imbalance between the number of livestock and supply of forage in ecotone between agriculture and animal husbandry in northeast China. Zey mays traditional harvesting approach was modified in order to increase the quantity and quality of forage. The approach of cutting top part from Zey mays plant was used in the experiment. Results show that the yield and 1000-seed weight of the kernel decreased compared with the traditional approach. Total starch and crude protein content of the kernel decreased. Crude protein and crude fat content of the cut top was higher than that of the contrast, while the NDF and ADF content decreased In comparing with the traditional approach. So the nutritional value of cutting top was better than that of the contrast. The experiment proved that the harvesting approach can be tried in ecotone between agriculture and animal husbandry in northeast China.