常规稻与Bt稻稻田生境中浮游藻类多样性比较研究

发布时间：2018-06-23 17:17

本文选题：稻田 + 浮游藻类　；参考：《湖南科技大学》2017年硕士论文

【摘要】：为了解稻田浮游藻类群落的多样性,以常规水稻和转Bt水稻“华恢1号”为试验材料,连续3年在湖南湘潭试验基地进行大田试验,对常规稻田浮游藻类群落多样性和转Bt水稻华恢1号稻田浮游藻类群落多样性进行分析,并对比常规稻稻田生境和转Bt水稻稻田生境浮游藻类群落的多样性,主要结果如下:1、常规水稻稻田浮游藻类群落主要由硅藻门、绿藻门、蓝藻门、裸藻门、甲藻门和隐藻门等组成。2012年共采集到浮游藻类6门69属149种,其中蓝藻门8属19种、绿藻门32属59种、硅藻门22属55种、裸藻门4属11种、甲藻门2属3种、隐藻门1属2种;2013年共采集到浮游藻类5门69属159种,其中蓝藻门12属24种、绿藻门29属66种、硅藻门22属55种、裸藻门4属12种、甲藻门2属2种;2014年共采集到浮游藻类6门70属154种,其中蓝藻门11属18种、绿藻门29属65种、硅藻门21属54种、裸藻门4属12种、甲藻门3属3种、隐藻门2属2种。浮游藻类的物种组成结构三年内整体上无明显变化,且稻田浮游藻类的丰富度保持较高水平,个体数量303.1~502.7,多样性指数3.98~4.40,均匀性指数0.833~0.905,优势集中性指数0.0178~0.0249,稻田水体为贫营养型,清洁水体,浮游藻类群落稳定性高。2、转Bt水稻稻田浮游藻类主要由绿藻门、硅藻门、蓝藻门、裸藻门、甲藻门、隐藻门和金藻门等组成。2012年共采集到浮游藻类7门68属147种,其中蓝藻门8属15种、绿藻门29属56种、硅藻门23属61种、裸藻门4属10种、甲藻门1属2种、隐藻门2属2种、金藻门1属1种;2013全年采集到浮游藻类6门67属156种,其中蓝藻门10属16种、绿藻门31属69种、硅藻门20属56种、裸藻门4属12种、甲藻门1属2种、隐藻门1属1种;2014全年采集到浮游藻类7门72属156种,其中蓝藻门11属17种、绿藻门30属66种、硅藻门22属56种、裸藻门4属12种、甲藻门3属3种、隐藻门1属1种、金藻门1属1种。三年内浮游藻类的物种组成整体上无明显变化,且稻田浮游藻类的丰富度保持较高水平,个体数量301.1~488.5,多样性指数4.16~4.46,均匀性指数0.831~0.904,优势集中性指数0.0171~0.0238,稻田水体为贫营养型,清洁水体,群落稳定性高。3、两类生境浮游藻类群落相似度和优势种亚群落相似度较高。2012全年在常规稻生境采集到浮游藻类6门69属149种,在Bt稻生境采集到浮游藻类7门68属147种,两生境共有的浮游藻类142种,两生境共有的优势种17种,两类稻田浮游藻类的物种组成相似度为0.9595,优势种相似度为0.5862;2013全年在常规稻生境采集到浮游藻类6门69属159种,在Bt稻生境采集到浮游藻类6门67属156种,两生境共有的浮游藻类146种,两生境共有的优势种为17种,两类稻田浮游藻类的物种组成相似度为0.9270,两生境优势种相似度为0.5231;2014全年在常规稻生境采集到浮游藻类7门70属154种,在Bt稻生境采集到浮游藻类7门72属156种,两生境共有的浮游藻类152种,两生境共有的优势种为18种,两类稻田浮游藻类的物种组成相似度为0.9806,两生境优势种相似度为0.6923。两类稻田的物种丰富度、个体数量、Shannon-Winner多样性指数、均匀性指数、与Simpson优势集中性指数等群落特征参数均无显著差异,且随时间的动态变化趋势也基本一致,Bt稻生境与常规稻生境浮游藻类的群落多样性未见显著差异。
[Abstract]:In order to understand the diversity of the planktonic algae community in the paddy field, a field test was conducted for 3 years in Hunan Xiangtan test base, in which conventional rice and Bt rice "Hua Hui 1" were tested for 3 years. The diversity of the planktonic algae community in the conventional paddy field and the diversity of the planktonic algae community in the paddy field No. 1 of the Bt rice Hua Hui 1 were analyzed and compared with the conventional rice fields. The diversity of planktonic algae community in habitats and Bt rice paddy fields, the main results are as follows: 1, the phytoplankton community in the conventional rice field is mainly composed of diatom gate, green algae gate, cyanobacteria gate, algae gate, alga gate and cryptoalgae gate, including 6 69 genera and 149 species of planktonic algae, including 19 species of cyanobacteria, 59 species of green algae gate, and diatom. There are 55 species of gate 22 genera, 11 species of naked algae, 2 genera 3 species, 2 species of cryptoalgae gate, 69 genera and 159 species of planktonic algae, including 69 genera, 69 genera and 69 genera of cyanobacteria. There are 65 species of gate 29 genera, 54 species of diatom gate, 12 species of open alga gate, 3 species of alga gate 3, 2 genus of cryptoalgae, 2 species. The species composition of planktonic algae has no obvious change in a year, and the abundance of planktonic algae in paddy field remains high, the number of individuals is 303.1~502.7, diversity index 3.98~4.40, homogeneity index 0.833~0.905, dominance concentration. Index 0.0178~0.0249, rice field water body is poor nutrition, clean water body, phytoplankton community stability high.2, to Bt rice field floating algae mainly from the green algae gate, diatom gate, cyanobacteria gate, alga gate, alga gate, cryptoalgae gate and golden algae gate, and so on, 68 genera, 15 species of cyanobacteria, 15 species of cyanobacteria, 29 genera of green algae gate, are collected. There are 61 species of diatom gate, 61 species of diatom gate, 10 species of naked algae, 2 species of 1 genera, 2 species of cryptoalgae gate, 2 species of cryptoalgae, 1 genera 1 of cyanobacteria and 1 genera 1. There are 156 species of gate 72 genera, of which there are 17 species of cyanobacteria, 66 species of green algae gate, 56 species of phytate 22 genera, 12 species of algae, 12 species, 3 species, 3 genera, phytas, phytas, phytas, phytas and algae, and the abundance of planktonic algae in the paddy field remains high, and the number of individuals is 301.1~488.5. The sex index 4.16~4.46, the evenness index 0.831~0.904, the dominant concentration index 0.0171~0.0238, the rice field water body is the poor nutrition, the clean water body, the community stability is high.3, the two kinds of habitat plankton community similarity and the dominant species subcommunity similarity are higher.2012 all year in the conventional rice habitats to collect 6 69 species of planktonic algae, in Bt rice habitats 68 genera and 147 species of planktonic algae were collected, 142 species of planktonic algae common in two habitats, 17 species in two habitats, 0.9595 in the species composition of planktonic algae in two rice fields, 0.5862 of the dominant species in 0.5862, 6 gates of phytoplankton in regular rice habitats were collected in two, and planktonic algae were collected in the habitat of Bt rice. There are 156 species, 146 species of planktonic algae common in two habitats, 17 dominant species in two habitats, 0.9270 in the two species of paddy field phytoplankton and 0.5231 in two habitats, and 2014 of 7 algae in the regular rice habitats in 2014. There were 152 species of planktonic algae in the habitat, 18 species of dominant species in two habitats, 0.9806 of the species composition of planktonic algae in the two rice fields. The similarity of the two habitat dominant species was the species richness of the 0.6923. two rice fields, the individual number, the Shannon-Winner diversity index, the average evenness index, and the concentration index of the Simpson dominance. There was no significant difference in the characteristic parameters, and the trend of dynamic variation with time was also basically the same. There was no significant difference in the community diversity between the Bt and the conventional rice habitats.
【学位授予单位】：湖南科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：S511;X173

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