Establishment of high-quality silage preparation technique corresponding to variation in sugar content of grass

1.北海道梯牧草基本草的水溶性碳水化合物（WSC）含量和糖组成随种植面积、生长期、收获期和品种的不同而存在显著差异.傍晚收获的牧草含水量高于早晨收获的牧草，夜间凋萎的牧草含水量下降幅度约为白天凋萎的9倍。添加乳酸菌菌剂的夜间萎蔫青贮在牧草含糖量低的地区品质较差.草的WSC含量可以通过红外分析以实际的准确度估计，该红外分析采用通过使用CII基团的散射的mPLS方法制备的校准曲线。低地和台地牧草的WSC与P含量呈显著负相关，火山岩土壤牧草的WSC与K含量呈显著负相关。无论何种土壤类型，牧草水溶性碳含量与土壤磷酸有效性、速效钾之间均无显著相关性.随着施氮量的增加，干物质产量逐渐接近标准施氮量，但可溶性固形物、果糖和蔗糖含量逐渐降低。增加施钾量不能改变干物质产量和水溶性碳水化合物含量. WSC含量在晚草中高于早草，在夜萎草中低于昼萎草。晚草和夜萎草的青贮饲料发酵品质明显较高。有没有显着差异，在TDN或DE含量或在DM或TDN的摄入量之间的收获或萎蔫时间。

1. The water-soluble carbohydrate (WSC) content and sugar composition of the basic grass in Hokkaido, timothy, markedly varied depending on the area, growth stage, harvest time, and breed.2. The WSC content of grass harvested in the evening was higher than that harvested in the morning, and the reduction of the WSC content of grass wilted at night was about 9 times greater than that of grass wilted in the daytime. Lactic acid bacterial inoculant-added silage wilted at night showed a poor quality in regions in which the sugar content of grass was low.3. The WSC content of grass could be estimated with practical accuracy by infrared analysis employing a calibration curve prepared by the mPLS method with scatter using the CII group.4. A significant negative correlation was noted between the WSC and P contents of grass grown in low and table land soils, and between the WSC and K contents of grass grown in volcanic soil. No significant correlation coefficient was obtained between the WSC content of grass and the availability of phosphoric acid in soil or between the WSC content and available soil potassium, regardless of the soil type.5. The dry matter yield increased to the standard application rate as the nitrogen application rate increased, but the WSC, fructose, and sucrose contents decreased. The dry matter yield or WSC content could not be changed by increasing the potassium application rate.6. The WSC content was higher in the evening grass than in the morning grass, and lower in the night-wilted than in daytime-wilted grass. The fermentation quality of silage was significantly higher in the evening grass and night-wilted grass. There were no significant differences in the TDN or DE content or in the DM or TDN intake between the harvest or wilting times.