虉草热值与灰分动态变化研究

Study on the Changes of Caloric Value and Ash Dynamic of Reed Canarygrass

通过对虉草的热值和灰分进行测定,探讨虉草热值和灰分的动态变化及二者之间相关性。结果表明,虉草干重热值呈现双峰的变化趋势,峰值分别出现在孕穗期和成熟期;虉草灰分含量随物候期呈现先降低后升高的变化趋势,成熟期灰分含量最低;去灰分热值随着生育时期推迟呈现逐渐降低的变化趋势,其顺序为孕穗期>抽穗期>盛花期>成熟期>果后营养期>枯黄期;各生育期干重热值与灰分含量之间均表现为负相关关系,其中抽穗期表现为极显著线性负相关(P<0.01),孕穗期和果后营养期表现为显著线性负相关(P<0.05),盛花期、成熟期和枯黄期相关性不显著。

This paper measured the caloric value and ash content of Reed Canarygrass, and discussed the dynamic variations and the correlation between the caloric value and ash content. The results showed ： The dynamic variations of dry mass caloric value followed a double peak pattern, and the peak value was observed hooting stage and autumn ; The dynamic variations of ash content indicated variation trend of firstly decreases and then increases, and the lowest value was observed autumn; The dynamic variations of ash-free caloric value followed change trend of gradually decreasing, and the order was booting stage 〉 heading stage 〉 flower stage 〉 autumn 〉 nutrition period after the fruit 〉 scorch phase ; There was significantly negative correlation between the dry mass caloric value and ash content of booting stage and nutrition period after the fruit（P 〈 0.05 ） and heading stage（P 〈 0. 01 ）, and there was no significant negative correlation at flower stage, autumn and scorch phase.