不同温度处理对日光温室甜樱桃萌芽速率和开花物候期的需热量研究

研究了不同温度处理(27-30℃、25-27℃、23-25℃、21-23℃)日光温室甜樱桃吐绿期、初花期、盛花期的需热量值,以生长度小时模型估算分别为2318-2375 GDH℃、6098-6618 GDH℃、6521-7008 GDH℃,以有效积温模型估算分别为59-66 D℃、137-173 D℃、145-181 D℃。明确了处理温度越低,甜樱桃不同发育期所需天数越长(14d、14d、15d、16d,34d、38d、49d、49d,38d、42d、51d、54d),原因是需热量积累速度慢和低温阴、雪天气叠加所致,而后者是起主要作用。初花期前低温处理(室内0-7.2℃)可提高花期开花的整齐度。#$NL

Calorific requirement research on effect of different temperatures on bud rate and blooming phenophase of sweet cherry in the solar greenhouse

Calorific requirement of sweet cherry in the sprouting date, first flower date and full bloom three periods were surveyed at different temperature treatments (27-30 °C, 25-27 °C, 23-25 °C, 21-23 °C), which were estimated by the growth degree hour model to be 2318-2375 GDH°C, 6098-6618 GDH°C, 6521-7008 GDH°C and which were estimated by the effective accumulated temperature model to be 59-66 D°C, 137-173 D°C, 145 -181 D°C respectively. It was clear that the lower the treatment temperature, the longer the days required for different developmental stages of sweet cherry (14d, 14d, 15d, 16d, 34d, 38d, 49d, 49d, 38d, 42d, 51d, 54d). It is caused by the slow speed of heat accumulation and the superposition of low temperature overcast and snow weather, while the latter factor played a major role. Low temperature treatment before first flowering (indoor temperature between 0 and 7.2 °C) can improve the uniformity of flower opening during flowering.