温州蜜柑花期幼果期异常落果的温度指标研究  

Temperature Index during Abnormal Early Drop of Satsuma

作　　者：黄寿波[1] 吴光林[1] 李三玉[1] 

机构地区：[1]浙江农业大学,杭州310029

出　　处：《中国柑桔》1993年第1期3-5,共3页South China Fruits

基　　金：国家自然科学基金;浙江省科委资助

摘　　要：温州蜜柑花期、幼果期异常落果与高温累积量(HTDD)有关。当HTDD大于6(℃·日)时,落果率明显增加。HTDD sum from n i=1 to n(T_i—T)△d,式中T为危害高温,谢花期T=28℃,幼果期T=31℃,T_i为日最高气温,T_i>T,d为天数。The factor causing abnormal drop of satsuma mandarin was studied. The abnormal early drop is influenced by the high temperature degree-days (HTDD). The result showed that percentage of bloom and fruit drop increased when HDTT reached more than 6℃·d. HTDD can be determined by the following equation:HTDD=sum from 1=1 to n (T_1—T)△dT is the maximum harmful temperature in a day ,which is 28℃ at the blooming stage ,and 31℃ at the young fruit stage. T_1(i=1,2…)is the maximum temperature higher than T(i. e. T_1>T) ,d is the number of days. The formula shows the relationship of the accumulated amount of different high temperatures at the blooming and the young fruit stages to the percentage of fallen fruits.

关 键 词：柑 温州蜜柑 落果 温度 

分 类 号：S436.661.1[农业科学—农业昆虫与害虫防治]