摘要
以7级目测法调查了安微省南部和北部地区夏收作物田共45个样点的杂草,并用系统聚类法分析比较了皖南、皖北夏收作物田杂草植被的差异和特点。皖南多为看麦娘杂草群落型,发生在与水稻轮作的水稻土田。皖北多为猪殃殃杂草群落型,发生在与秋熟旱作物轮作田地,其包括两类杂草群落:猪殃殃—野燕麦—阿拉伯婆婆纳·小根蒜杂草群落和麦仁珠+播娘蒿+大巢菜·麦瓶草杂草群落。轮作制度和地理区域的差异是导致这一特点的主要因素。
The weed communities in 45 sampling sites composed of 358 summer crop fields in the northern and southern regions of Anhui Province were surveyed by visual scoring weed infestation level in seven scales. The result analysed with the cluster analysis showed that Alopecurus weed formation group distributed more in the south than in the north and almost appeared in the paddy soil fields with the rotation of rice; on the other hand, Calium weed formation group more often distributed in the drylands with the rotation of autumn dry crops mainly in the north. The latter consisted of two kinds of weed communities: Galium aparine—Avena fatua—Veromica persica·Allium macronstemon weed ass. distributing also in the south while Galium tricorne+Descurainia sophia+Vicia sativa·Sinele conoidea weed ass. occurring only in the north. The weed vegetation in summer crop fields was influenced and determined by soil moisture and climate caused by the rotation system and geographical factors.
出处
《南京农业大学学报》
CAS
CSCD
北大核心
1996年第2期17-21,共5页
Journal of Nanjing Agricultural University
关键词
杂草群落
聚类分析
夏收作物
安徽
weed communities
Galium L.
cluster analysis
summer crop
Anhui Province
