摘要
刈割时间(Cutting time CT)和晾晒时间(Drying time DT)是影响干草品质的主要因素,收获期的研究已经取得长足进展,刈割时间和晾晒时间对天然牧草干草品质的影响还是空白,研究刈割时间和晾晒时间对天然牧草干草品质的影响,确定适宜刈割时间和晾晒时间对保存干草品质具有重要意义。在不同刈割时间(08:00h,12:00h,16:00h)对天然草地牧草进行刈割,刈割后在不同晾晒时间点(0h、2h、4h、6h、8h、10h、12h、24h、26h、28h、30h、36h、48h、72h)取样,进行常规营养成分分析。结果表明,08:00h、12:00h、16:00h刈割天然草地牧草晾晒72h后均达到安全含水量,可以打捆贮藏,刈割时间和晾晒时间的交互作用对天然牧草干草DM含量和CP含量影响差异显著(P<0.05),对天然牧草干草ADF含量、NDF含量、Ash含量的影响无显著差异(P>0.05)。同一天内,刈割越晚返潮作用越明显,营养物质流失越严重,应尽早刈割。由于光照作用,晾晒时间越长,营养流失越严重,达到安全含水量应尽快打捆,保障干草品质。刈割时间和晾晒时间的交互作用对天然牧草干草CP含量有显著影响,表明干草品质受刈割时间和晾晒时间双重影响。
Cutting time and drying time are the main factors affecting the quality of hay. Harvesting has made considerable progress. Effect of cutting time and drying time on the quality of natural grass is blank. It is necessa- ry to research the effects of cutting time and drying time on the quality of natural grass and selected appropriate cutting time and drying time for preserving hay quality better. Cutting the natural grass an different time （08 ： 00h, 12 ： 00h, 16 ： 00h）. Samples were taken and analyzed at different time points （Oh, 2h, 4h, 6h, 8h, 10h, 12h, 24h, 26h, 28h, 30h, 36h, 48h, 72h）. The results show that natural grass after drying 72h have achieved safety moisture content to baling. Their interaction on DM and CP was significant differences of natural grass hay （P〈0.05）. And the interaction on ADF, NDF, Ash were no significant differences （P〉0.05）. In the same day, cutting later the more obvious dampness the more serious loss of nutrients should be cut as soon as possible. Due to light, the longer drying time, the more serious nutrient loss, to ensure the quality of hay should be bundled as soon as possible when it has achieved safety moisture content. The interaction between cutting time and drying time had a significant effect on CP content of natural forage hay, which indicated that hay quality was affected by cutting time and drying time.
作者
都帅
尤思涵
包健
格根图
贾玉山
Du Shuai You Sihan Bao Jian Gegentu Jia Yushan(College of Grassland, Resources and Environment, Inner Mongolia Agricultural University Huhhot, 010019)
出处
《草原与草业》
2017年第1期38-42,共5页
Grassland and Prataculture
基金
半干旱牧区天然打草场培育与利用技术(201303060)
硕士研究生科研创新项目(S20151012910)资助
