排序方式: 共有31条查询结果,搜索用时 15 毫秒
1.
随着生活水平的提高,人们对牛奶的需求量大大地增加,进而拉动着奶牛的产业链条。加上营养科学观念的深入人心,各大奶业巨头奶源之争的推波助澜。人们认为投资奶牛前途光明,兴趣空前高涨。 从发展的角度讲,投资奶牛业确实是一个热点,市场的发展空间也很大。但是,在其近几十年发展中也经常出现曲折,盲目投资 相似文献
2.
Phoebe is a traditional precious tree species in China, which has great economic and ecological value. A new disease twig blight was found in the Phoebe planting area of Zhejiang province. Symptoms usually appear on the base or fork of branches with black swollen epidermis and gradually get worse resulting branch wilting or whole plant death when longitudinal epidermis cracking. The diseased samples were collected in 2017-2018 and the fungal isolate was identified as Lasiodiplodia pseudotheobromae based on morphological characteristics of colony and spore and sequence analysis of ITS region and EF1-α gene. The pathogenicity tests on Phoebe showed that L. pseudotheobromae caused the typical symptoms of twig blight. Koch′s postulates were satisfied following reisolation and identification of the isolate from the infected tissues using the methods described above. This is the first report of Phoebe twig blight caused by L. pseudotheobromae in China. 相似文献
3.
4.
特色农产品要比一般性农产品具有明显的比较优势.如果能通过产业化的发展则会产生更大的效益。发展特色农产品产业化是梧州市区域经济发展的重要基础。明确发展梧州市特色农产品产业化的指导思想,依托本地自然资源和区位优势,因地制宜地做好特色农产品产业化模式选择与发展规划,加强特色农产品产前、产中、产后服务保障网络建设.形成具有本地特色的产业链和产品体系.能够极大提高梧州市特包农产品竞争力和综合生产效益。 相似文献
5.
6.
7.
8.
9.
10.
在提倡绿色环保食品的今天,肉羊以其独到的饲养方法和丰富的营养价值成为了人们餐桌上必不可少的一样美味绿色食品,在羊肉被人们接受的同时,羊肉市场的需求也逐渐加大,同时国内外羊肉市场在这个时期 相似文献