饲用型杂交构树在甘肃地区的种植适应性研究  

An planting-adaptability test of forage hybrid Broussonetia papyrifera in Gansu

作　　者：郭琪[1] 张军[1] 李鑫 王沛雅[1] 巩晓芳[1] 杨晖[1] GUO Qi;ZHANG Jun;LI Xin

机构地区：[1]甘肃省科学院生物研究所,甘肃省微生物资源开发利用重点实验室"特色微生物与植物资源创新"甘肃省国际科技合作基地,甘肃兰州730000

出　　处：《饲料研究》2020年第7期106-110,共5页Feed Research

基　　金：甘肃省科学院科技产业化项目(项目编号:2019CY-06);甘肃省科学院与中科院合作项目(项目编号:2017HZ-04);甘肃省科学院创新团队建设项目(项目编号:2019CX004-01);甘肃省科学院创新团队计划(项目编号:CX201601);甘肃省基础研究创新群体计划(项目编号:1606RJIA325)。

摘　　要：试验旨在研究刈割次数对饲用型杂交构树生长的影响,讨论杂交构树在甘肃天水、兰州及张掖地区的种植适应性。结果表明:刈割次数对以上3个地区种植的杂交构树生长量、营养成分和返青率的影响各不相同。3个试验区刈割1次的产量均显著高于两次的产量(P<0.05),但中性洗涤纤维(NDF)和酸性洗涤纤维(ADF)含量显著增加,容易利用的粗蛋白质(CP)含量显著减少(P<0.05)。刈割1次或两次,天水地区杂交构树的翌年返青率均可达90%以上,兰州地区可达50%以上;对张掖地区杂交构树翌年返青率影响较大,刈割1次的返青率要比两次的高出3.5倍。刈割1次翌年刈割两次,天水地区杂交构树年产量可达5 t以上,远高于兰州与张掖试验区,表现出了良好的适应性;兰州与张掖地区杂交构树生长量显著下降(P<0.05),但第3年返青率均在50%以上。研究表明:饲用型杂交构树在甘肃地区具有一定的种植适应性,但需因地制宜地制定刈割计划,采取相应的土壤栽培管理与越冬措施来获取最大的经济效益。The paper was to study the effect of annual mowing frequency on the growth of forage hybrid Broussonetia papyrifera to discuss its adaptability in Tianshui,Lanzhou and Zhangye areas of Gansu Province.The results showed that the impact of the annual mowing frequence on the annual growth,nutrient content and wintering rate of forage hybrid Broussonetia papyrifera planted in the above three areas was different.The annual yield of forage hybrid Broussonetia papyrifera mowed once a year in each pilot area was significantly higher than that mowed twice a year(P<0.05),but the percentage content of NDF and ADF was significantly increased,while the content of CP,which was easy to use,was significantly reduced(P<0.05).Whether it was mowed once or twice,winterting rate of forage hybrid Broussonetia papyrifera was more than 90%in the Tianshui test area and more than 50%in the Lanzhou test area.The annual mowing frequence had a great influence on the second-year survival rate of forage hybrid Broussonetia papyrifera in Zhangye test area,and the wintering rate after mowing once a year was 3.5 times higher than that after mowing twice a year.When it was once in the first year,and twice in the second year,the annual yield of forage hybrid Broussonetia papyrifera that shows good adaptability in Tianshui test area was more than 5 t,which was much higher than that of Lanzhou and Zhangye test area.While the annual growth of forage hybrid Broussonetia papyrifera in Lanzhou and Zhangye test area decreased significantly(P<0.05),but wintering rate in the third year was more than 50%.The results suggest that the forage hybrid Broussonetia papyrifera has certain planting-adaptability in Gansu,but it is necessary to make mowing plan according to local conditions,and adopt corresponding soil cultivation management and overwintering measures to obtain the maximum economic benefits.

关 键 词：杂交构树 甘肃省 种植适应性 刈割次数 

分 类 号：S792.99[农业科学—林木遗传育种]