30年代，我国蚕业科学工作者开始把近代科学运用到柞蚕放养上来，改进了我国柞蚕放养技术。
In 1930s, the modern science and technology was applied to the tussah silk production and improved the techniques for the tussah silkworm raising in China.
介绍池塘养蟹必须掌握的蟹池条件、蟹种放养、饲养管理、病害防治等主要技术环节。
This article deals with the technical links such as the required conditions of ponds, the raising of crab breed, the management of pond-farming and the diseases prevention, etc.
介绍池塘养蟹必须掌握的蟹池条件、蟹种放养、饲养管理、病害防治等主要技术环节。
This article deals with the technical links such as the required conditions of ponds, the raising of crab breed, the management of pond-farming and the diseases prevention, etc.
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