摘要
采用分期播种方法对赣饲一号纤毛鹅观草生长发育与温度的关系进行了研究。结果表明,影响该草发育进程的温度条件主要为均温及有效积温,且生育前期(营养生长阶段)以均温为主,随着生育期的推进、生殖生长的增强,有效积温逐渐成为主导因素;出苗至各生育期所需的生长天数及积温与成熟期产草量间存在着显著的相关关系,除分蘖期为显著负相关外,其它各生育期均为极显著正相关;各生育阶段生长天数对成熟期产草量影响的大小依次为分蘖至拔节、开花至成熟、拔节至孕穗、出苗至分蘖、抽穗至开花及孕穗至抽穗。
Roegneria ciliaris, a perennial grass, was seeded at different times from semptember to february seeded year. The relationship between the growth/development and temperatures were studied. The results indicate that: 1) The major temperature conditions which affected the development of this grass should be the average temperature (AT) and the effective accumulated temperatures (EAT). It is one of the prime factors in the earlier period of development (the nutritional growth). Afterwards, wgen the edevelopment of the grass goes on and the reproductive growth speeds up,then the EAT becomes a dominant factor. 2) There are close correlations between the hay yield of the grass in ripening period and the duration of this grass as well as the accumulated tempertures. The correlations are very close positive in all other periods except the tillering period, in which the correlation is close negative. The ranges of the effect of the growth duration in every development stage on the hay yield in ripening period are as follows: the tillering～node extending (jointing)stage>the flowering～ripening stage>the node extending～booting stage>the imerging～tillering stage>heading～flowering stage>the booting～heading stage.
出处
《中国草地》
CSCD
1992年第3期32-35,共4页
Grassland of China
