一、前言在广岛县,作为温州蜜柑的替换品种,由于发现华盛顿脐橙的早熟芽变品系,如村上系、大三岛系,用高接法进行了替换。至今该县的栽培面积已超过500公顷。但是,从试栽的脐橙的早熟品系来看,由于花量过多.树势衰弱,收获时果小、裂果多,优质果达不到结果量的30%。由于小果、裂果 I. Preface In Hiroshima Prefecture, as an alternative to Wenzhou Satsuma, it was found that the premature sprouting strains of Washington Navel orange, such as Murakami and Mishima, were replaced by high-grade ones. So far the county has cultivated more than 500 hectares. However, judging from the early-maturing lines of planted navel oranges, due to the excessive flowering, the shrubs are weak, the harvesting time is small, and the number of cracked fruits is more than 30% of the result. Because of small fruit, crack fruit