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1979年以来,我们先后到佛山的顺德、南海;肇庆的郁南、罗定、德庆;湛江的化州、高州、信宜;韶关的英德、翁源、乳源、乐昌、始兴、曲江、清远;惠阳的博罗、紫金、惠阳;梅县的平远、兴宁、五华;海南的文昌、琼山、琼海、白沙、临高、崖县、海口等28个县市的58个区对桑树品种资源进行了调查和搜集,共整理了桑树资源材料351份(其中属栽培类型的广东桑318份),这些材料种于省蚕研所的桑树资源圃内。所有材料按株行距20×133厘米栽植。现将几年的观察调查结果整理如下。
Since 1979, we have successively visited Shunde and Nanhai in Foshan; Yuenan, Luoding and Deqing in Zhaoqing; Huazhou, Gaozhou and Xinyi in Zhanjiang; Yingde, Ruyuan, Ruyuan, Lechang and Shixing in Shaoguan; , Qujiang, Qingyuan; Boluo, Zijin and Huiyang in Huiyang; Pingyuan, Xingning and Wuhua in Meixian; 28 counties and cities in Wenchang, Qiongshan, Qionghai, Baisha, Lingao, Yaxian and Haikou in Hainan Province Of the 58 districts of mulberry varieties of resources were investigated and collected a total of 351 mulberry material resources (which is a cultural type of Guangdong mulberry 318), these materials planted in the provincial silkworm mulberry Institute of Resources Park. All materials according to plant spacing 20 × 133 cm planted. The observations of several years are now organized as follows.