摘要
利用2017年12月至2018年2月内蒙古砖墙体日光温室的小气候观测资料,通过对日光温室内番茄生长发育资料及冻害影响因素的分析,建立了不同天气条件下温室内外最低气温回归模型,并确定了不同等级番茄冻害温室外最低温度指标。结果表明,日光温室番茄发生低温冻害不仅与日最低气温有关,而且与低温持续时间和相对湿度等有关。晴天、多云和阴天天气条件下,日光温室内日最低气温与温室外日最低气温的二次曲线拟合最优,相关系数分别为0.733、0.820、0.423。晴天、多云和阴天时番茄轻度冻害指标分别为-18.5^-10.4℃、-10.6^-7.4℃、-8.4^-4.4℃,中度冻害指标分别为-20.5^-18.5℃、-13.0^-10.6℃、-11.4^-8.4℃,而重度冻害指标分别为≤-20.5℃、≤-13.0℃、≤-11.4℃。
Based on microclimate observed meteorological data within a greenhouse from December 2017 to February 2018 in Inner Mongolia,the tomato growth data and frost damage factors were analyzed,and the regression models of daily minimum temperature in⁃side and outside greenhouse under different weather conditions were established.Meanwhile,the minimum temperature index of differ⁃ent levels for tomato freeze injury was ascertained.The results showed that,the occurrence of low temperature and freeze injury for greenhouse tomato was not only related to the daily minimum temperature,but also to the duration of low temperature and relative hu⁃midity.The quadratic curve of daily minimum temperature inside and outside the greenhouse was fitted the best in clear,cloudy and overcast days,and the correlation coefficients were 0.733,0.820,and 0.423,respectively.The temperature forecast index for mild freeze injury was-18.5^-10.4℃,-10.6^-7.4℃,and-8.4^-4.4℃in clear,cloudy and overcast days,the temperature forecast index for moderate freeze injury was-20.5^-18.5℃,-13.0^-10.6℃,and-11.4^-8.4℃in clear,cloudy and overcast days,and the corre⁃sponding values for severe freeze injury were≤-20.5℃,≤-13.0℃,and≤-11.4℃in three weather conditions,respectively.
作者
肖芳
李云鹏
杨玉辉
吴昊
XIAO Fang;LI Yun-peng;YANG Yu-hui;WU Hao(Ecological and Agricultural Meteorological Center,Inner Mongolia Meteorological Bureau,Huhhot 010051,China;Meteorological Bureau of Xingan League,Wulanhaote 137400,Inner Mongolia,China;Inner Mongolia Meterorological Training Center,Huhhot 010051,China)
出处
《湖北农业科学》
2020年第7期117-120,173,共5页
Hubei Agricultural Sciences
基金
国家重点研发计划重大自然灾害监测预警与防范专项(2018YFC1506606)
内蒙古自治区气象局青年基金项目(nmqnqx201910)。
关键词
日光温室
番茄
低温冻害
回归模型
内蒙古
greenhouse
tomato
low temperature and freeze injury
regression model
Inner Mongolia
