摘要
以饲用甜高粱海牛品种为试材,以不同刈割频率为处理:年刈割1茬T_(1-1)、年刈割2茬第1次T_(2-1)和第2次T_(2-2),研究刈割频率对甜高粱产量和饲用价值的影响程度。结果表明:(1)适度的刈割频率有利于分蘖,会降低株高、主茎粗和节数;(2)刈割2茬较刈割1茬鲜草产量增加10.66%;(3)营养成分方面,刈割有利于粗蛋白、粗脂肪、粗灰分和可溶性糖的积累,却降低了含水量和无氮浸出物含量,而粗纤维变化无明显规律;(4)营养价值T_(2-1)和T_(2-2)分别较T_(1-1)增加13.54%和8.23%;饲用价值由高到低依次是T_(2-2)>T_(2-1)>T_(1-1),T_(2-2)和T_(2-1)的饲用价值分别较T_(1-1)增加5.62%和1.89%
In order to clarify the effect of mowing frequency on yield and feeding Value of forage sweet sorghum, The forage sweet sorghum varietie Hainiu were used as test materials, and the mowing frequency was used as different treatments, which included mowing 1 times per year （T1-1）, 2 times per year of first T2-1 and second times per year T2-2. The results showed： （1） Appropriate mowing frequency was beneficial to tiller, which will decrease the plant height, the thick and the number of nodes of forage sweet sorghum. （2） The yield of fresh grass was increased by 10.66% of mowing second times than that of mowing 1 times per year. （3） In the aspect of nutrient composition, the mowing （either one or two times） was beneficial to the accumulation of crude protein, crude fat, crude ash and soluble sugar content, which reduced the water content and the content of nitrogen-free extract, and the crude fiber had no obvious change. （4） The nutrition value of T2-1 and T2-2 increased by 15.26% and 8.23%, respectively, compared with that of Tl-l. The feeding value from high to low was T2-2 〉 T2-1 〉 T1-1, and the feeding value of T2-2 and T2-1 was increased by 5.62% and 1.89%, respectively.
出处
《中国糖料》
2018年第1期35-37,39,共4页
Sugar Crops of China
基金
甘肃省科技重大专项计划(1502JKDA006)
关键词
甜高粱
刈割频率
产量
饲用价值
forage sweet sorghum
mowing frequency
yield
, feeding value
