小麦主茎生育速度对分蘖形成及其成穗的影响

The Effects of the Growth and Development Rates of Mother Shoots on the Emergence and Survival of Tillers

对冬小麦品种农林61号的3年观察结果表明：母茎地上部的生育速度与各生育期的长度有关，生育期长度越长，母茎生育速度就越慢；单株最大分蘖数、无效分蘖数、有效分蘖数和分蘖成穗率与植株生育期长度及母茎生育速度有关。出苗至拔节期的长度长，母茎地上部的生育速度慢，最大分蘖数就多；拔节至抽穗期的长度长，母茎地上部的生育速度慢，无效分蘖就少，分蘖成穗率就高；因而出苗至抽穗期的长度越长，母茎地上部的生有速度越慢，有效分蘖数就越多。

Observations of three years on winter wheat (Triticum aestivum L.) plants,cv. Nolin 61 showed that, the growth and development rates of mother shoots (MGR) were affected by the plant growth period lengths(GPL), the longer GPL, the slower MGR was. The differences of maximum tiller numbers (MTN), infertile tiller numbers (ITN), fertile tiller numbers(FTN) per plant and percentages of fertile tillers (FPT) caused by environmental conditions, were related to the GPL and MGR. It was found longer GPL and slower MGR from emergence to stem elongation stage were favourable for MTN and FTNl and longer GPL and slower MGR from stem elongation to heading stage were favourable for FTN and FPT, and decreased ITN.