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水稻原产于热带和亚热带,长期形成一种喜温好湿的特性。水稻的生长发育和产量与稻田水温关系很密切。 1.分蘖期与水温分蘖期间水温低,往往会抑制水稻的营养生长,推迟出穗期,影响穗收。实验表明,分蘖期的日平均水温低于22℃时,出穗期平均延迟3～4天,减产10％左右。因此,在分蘖期促进水稻早生快发。 2.幼穗发育期与水温据实验,水稻花粉母细胞减数分
Rice native to the tropics and subtropics, long-term formation of a warm and humid nature. Rice growth and development and rice yield is closely related to water temperature. 1. Tillering and water temperature During the tillering period, the water temperature is low, which often inhibits the vegetative growth of rice, postpones the heading stage and affects the ear harvest. Experiments show that when the average water temperature at tillering stage is lower than 22 ℃, the average heading time is delayed by 3-4 days and the yield is reduced by about 10%. Therefore, in the tillering of rice to promote rapid premature birth. 2. Panicle development and water temperature According to the experiment, rice pollen mother cells down points