摘要
本研究以兰州地区种植的杂交构树(Broussonetia papyrifera)为材料,对两种水肥条件下杂交构树的生长量和营养成分动态变化规律进行了研究,并采用灰色关联度分析和权重赋值法对两次刈割时的株高、产量、粗蛋白(crude protein,CP)、粗灰分(Ash)、中性洗涤纤维(neutral detergent fiber,NDF)、酸性洗涤纤维(acid detergent fiber,ADF)含量进行综合评价,以确定两次刈割最佳刈割期。结果表明:高肥力区杂交构树在第3个生长月进入株高与产量的快速生长期,低肥力区杂交构树进入快速生长期的时间要比高肥力区滞后1个月。两个肥力区的CP含量均在第3个生长月即植株进入快速生长期时含量最高,而后显著下降(P<0.05)。Ash含量均呈现逐月下降的趋势,不同之处在于两个肥力区呈显著下降(P<0.05)的月份不同,低肥力区较高肥力区提前1个月。NDF、ADF含量在两个肥力区基本表现了相同的升高趋势,在第5个生长月均达到了最高。灰色关联度分析和权重赋值法结果显示,两种水肥条件下,两次刈割时间安排为第2个生长月和第4个生长月时综合评价值均最高,建议杂交构树在兰州地区两次刈割的适宜刈割期为第2个生长月和第4个生长月。
The dynamic change in the growth and nutrient composition of hybrid Broussonetia papyrifera under two water and fertilizer conditions in the Lanzhou area was studied.A grey relational analysis and weight assignment method were adopted for the comprehensive evaluation of plant height,yield,crude protein(CP),ash,neutral detergent fiber(NDF),and acid detergent fiber(ADF)from each of two mowing events to determine the optimal cutting period.The results showed that hybrid Broussonetia papyrifera in the high-fertility area entered the fast-growing period for plant height and yield in the third growing month.For the hybrid Broussonetia papyrifera in the low-fertility area,the time of entering the fast-growing period was one month later than that in the high-fertility area.CP content in the two fertility areas was the highest in the third growing month when the plants entered the fast-growing period and then decreased significantly(P<0.05).In both fertility areas,the ash content showed a continual downward trend.The two fertility areas showed a significant decline in ash content by month(P<0.05).The low-fertility area presented a highly significant decline in ash content one month earlier than that of the high-fertility area.The content of NDF and ADF exhibited the same increasing trend in the two fertility areas,and reached the highest level in the fifth growing month.The results of the grey relational analysis and weight assignment demonstrated that the comprehensive evaluation value was the highest when the hybrid Broussonetia papyrifera were cut in the second and fourth growing months under the two water and fertilizer conditions.The second and fourth growing months are suggested as the suitable cutting periods for hybrid Broussonetia papyrifera in Lanzhou.
作者
郭琪
李鑫
杨晖
巩晓芳
王沛雅
张军
彭献军
GUO Qi;LI Xin;YANG Hui;GONG Xiaofang;WANG Peiya;ZHANG Jun;PENG Xianjun(Institute of Biology,Gansu Academy of Sciences/Key Laboratory of Microbial Resources Exploitation and Application/Gansu International Science and Technology Cooperation Base of Microorganism and Plant Germplasm Resources&Genetic Improvement,Lanzhou 730000,Gansu,China;Institute of Botany,Chinese Academy of Sciences,Beijing 100093,China)
出处
《草业科学》
CAS
CSCD
2019年第12期3111-3119,共9页
Pratacultural Science
基金
甘肃省科学院与中科院合作项目“杂交构树在兰州地区的刈割利用技术研究(2017HZ-04)”
甘肃省科学院科技产业化项目(CY06)
甘肃省科学院创新团队计划(CX201601)
甘肃省基础研究创新群体计划(1606RJIA325)
关键词
杂交构树
兰州地区
生长动态
刈割期
灰色关联度
hybrid Broussonetia papyrifera
Lanzhou region
growth dynamic
mowing period
grey relational analysis
