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一、气候夏威夷山区年平均降雨量为1,550毫米。实际降雨量因向风或背风以及海拔高度而有显著的差异。5月到10月为干燥的热季。11月到4月由于极地冷空气的入侵,温度下降,雨量较均匀。这时,由于日照较短,菠萝的花候期受到特别强的自然刺激。菠萝植区有1/4或1/5的面积实行了灌溉。往往在山腰引水,同时也有许多自流井。菠萝田大部分位于拔海100—400米的地区。温度对果实质量和块茎芽,尤其是裔芽,有决定性的影响。实验室或大田进行的多次实验都证明了这一点。
First, the climate Hawaii, the annual average rainfall of 1,550 mm mountain. The actual rainfall is significantly different due to wind or leeward and altitude. May to October for the dry hot season. November to April due to the invasion of polar cold air, the temperature dropped, the rainfall is more uniform. At this time, due to the shorter sunshine, pineapple flowering period is particularly strong natural stimulation. One-fourth or one-fifth of the area of pineapple is irrigated. Water diversions are often found on mountainsides, and there are many artesian wells. Most pineapple fields are located in the area of 100-400 meters above sea level. The temperature has a decisive effect on the quality of the fruit and on the tuber buds, especially the descendants. Many experiments conducted in laboratories or in Daejeon have proved this point.