水生植物在渔业生态养殖中的开发应用(综述)

阐述水生植物的生态功能特性与生态修复原理,以及近年来水生植物在渔业生态养殖中作为水产动物绿色饲料与病害生态防治环境友好药物的来源、有害有毒藻类控制的化感解毒生物资源、污水生物净化与渔业水域生态修复的开发应用。同时就水生植物在水产生态养殖与渔业水域环境修复开发应用中存在的问题进行探讨,并提出相应的建议。

水稻纹枯病生境生态位研究

水稻同一生育期各生境点之间的生态位功能指数存在差异 ,表现为田块中部 >北侧边线、西侧边线、东侧边线 >南侧边线 >田角。这说明在各生境位点上 ,水稻纹枯病菌对资源的占有和利用效能是不同的。在田中部水稻纹枯病菌对占有和利用最为充分 ,因此 ,水稻纹枯病菌的繁衍也最快 ,对水稻的危害也最大 ,而在田角则相反。水稻田的田角和田块南侧边线生境位点对水稻纹枯病的控制作用最强。

葡萄根癌病的发生及其生态

前言日本果树的根癌病是引进苗木时,不注意检疫从国外带进的。1890年最初发生在和歌山县和大阪府从南美引进的樱桃上,以后随苗木在各地的扩散,传染到了其他果树上并造成了危害。关于葡萄根癌病,1912年从北美引进的葡萄苗木有发病的记载,后来没有发现有恒常的危害,于是该病未形成问题。近几年在岩手、山形、长野、山梨、岛根各县均有该病发生,由于对该惰的研究尚不完全,因此至今尚无有效的防治方法。

水稻慢瘟病鉴定条件的初步研究

选用经测定初步认为具有慢瘟抗性的水稻品种二九丰和浙辐802作为供试品种,并设抗、感对照品种各一个,研究了它们在不同病害生态条件下的慢瘟性组分。结果表明接种孢子浓度、施肥水平和光照等条件对鉴定结果有较大的影响,还提出了鉴定慢瘟性的适宜孢子浓度为10万/ml左右,同时应适当多施氮肥以保持稻苗嫩绿,提高鉴定的准确性。

Occurrence Dynamics and Control Strategies of Major Pests and Diseases of Sugarcane in Yunnan

In recent years, the occurrence and harm of many kinds of pests and diseases have become increasingly serious in Yunnan sugarcane areas, which have greatly affected the sustained and stable development of sugarcane production, so the situation of their prevention and control has become rigorous. In order to scien- tifically and effectively prevent and control pests and diseases of sugarcane to en- sure the safety of sugarcane production, on the basis of an investigation and re- search, according to the present situation of sugarcane production in Yunnan, the occurrence dynamics of major pests and diseases of sugarcane were analyzed, and corresponding control strategies were proposed according to the major pests and diseases as well as their occurrence and damage characteristics.