论文部分内容阅读
观察了水稻品种老来青在六个不同生长发育时期遭受土壤干旱的影响,其中以孕穗期受害最重,形成畸形颖花,其次是分蘗前期和灌浆乳熟期,减产亦较乡。胜利秈则是在开花期受旱害最为严重,容易形成大量白穗。稻株在拔节期和分蘗后期有较强的抗旱力。干旱减产的因素可能是多种多样的,视生长发育时期和干旱的条件而異。在孕穗期和开花期遭受短期干旱后,强烈地破坏了营养生长和生殖生长的正常相关,是减产的一个主要原因。
The effects of drought on the soil were studied in six different growth and development stages of the rice cultivar Laolingqing, among which the most severe was booting stage, forming deformed spikelets, followed by the early tillering stage and the milking stage of filling, and the yield reduction was also more than the township. Victory indica is the most serious drought in flowering, easy to form a large number of white spike. Rice plants had strong drought resistance at the jointing and late tillering stages. Drought reduction factors may vary widely, depending on the period of growth and development and the conditions of drought. Short-term drought at booting and flowering strongly undermines the normal correlation between vegetative and reproductive growth, a major cause of yield reduction.