摘要
以农科1号木地肤为材料,通过研究不同时间(7月28日、8月19日、9月16日)刈割对其产量、品质的影响,以确定其最佳刈割时间。试验结果表明:返青后,农科1号木地肤生长缓慢,进入分枝期(5月下旬)后生长加快,到开花期(8月中旬至9月初)生长几乎停止;8月19日刈割,干物质产量可达15 045.5 kg/hm^2,高于7月28日及9月16日;8月19日刈割,粗蛋白含量与7月28日差异不显著(P>0.05),但显著(P<0.05)高于9月16日,同时随着刈割时间的延后,茎叶比、粗纤维、ADF、NDF的含量逐渐升高;各部位中蕾的粗蛋白含量最高,可达24.07%,品质最好,其次是叶,最后是茎;8月中旬农科1号木地肤的茎叶比为0.56,与7月下旬相比差异不显著(P>0.05),显著(P<0.05)低于9月中旬的茎叶比。由该试验结果可以得出,在8月中旬至9月初开花期对农科1号木地肤进行刈割可收获较多的叶、蕾和较高的干物质产量,且品质较好。
The aim of this study was to determine the optimal mowing time of Kochia prostrata(L.)Schrad.cv.Nongke No.1.An experiment was designed to statistically assessed the effect of different mowing time(July 28,August 19,September 16)on the yield and quality of′Nongke No.1′.The main results were shown as follows:the growth of′Nongke No.1′was slow after the resume growth,then accelerated after the branching stage(in late-May),and almost ceased at the flowering stage(from mid-August to early-September);the obtained dry matter yield of′Nongke No.1′was 15 045.5 kg/hm^2 when mowed on August 19,which was higher than that mowed on July 28 and September 16;there was no significant(P>0.05)difference in crude protein content of′Nongke No.1′between mowing time of August 19 and July 28,but statistically significant(P<0.05)higher crude protein content was observed in mowing time of August 19 compared to September 16;with the delay of mowing time,the stem-leaf ratio and content of crude fiber,ADF and NDF were increased gradually;among the different parts of the plant,the buds had the highest(24.07%)crude protein content and best quality,followed by leaves and stems;when mowed in mid-August,the ratio of stem to leaf of′Nongke No.1′was 0.56,which had no significant(P>0.05)difference with that mowed in late-July,but was significantly(P<0.05)lower than that mowed in mid-September.The combined data suggest that more leaves and buds,higher dry matter yield and better quality can be obtained when′Nongke No.1′is mowed during the flowering period from mid-August to early-September.
作者
展春芳
伊风艳
孙海莲
王岳
杨鼎
王海明
王颖杰
ZHAN Chun-fang;YI Feng-yan;SUN Hai-lian;WANG Yue;YANG Ding;WANG Hai-ming;WANG Ying-jie(Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences,Hohhot 010031,China;Inner Mongolia Prataculture Research Center,Chinese Academy of Sciences,Hohhot 010031,China;Grassland Station of Chifeng,Chifeng 024000,China)
出处
《畜牧与饲料科学》
2019年第8期42-46,共5页
Animal Husbandry and Feed Science
基金
国家重点研发计划项目（2016YFC0500705）
关键词
农科1号木地肤
刈割时间
营养成分
产量
Kochia prostrata(L.)Schrad.cv.Nongke No.1
mowing time
nutritional components
yield
