浙江金衢盆地小麦—杂草群落的研究

用模糊图论中的最大树法,对金衢盆地的小麦-杂草群落进行了分类研究,结果表明,该区小麦-杂草群落分成4个类型,即潮土田上的小麦(Triticum aestivum)-野燕麦(Auena fatua)-春蓼(Polygonum persicaria)一荠菜(Caspsella bura-pas-toria)-猪殃殃(Galium aparine var.teneruml)群落,低丘岗地上的小麦-猪殃殃-野燕麦-波斯婆婆纳(Veronica persica)群落,水稻土田上的小麦-看麦娘(Alopecurusaequalis)-雀舌草(Stellaria alsine)-牛繁缕(Malachium aquaticum)-春蓼群落及烂浸田上的小麦-翅茎灯心草(Juncus alatus)-春蓼-看麦娘-扬子毛茛(Ranunculus sieboldii)群落。分析表明,土壤类型、pH、地形地貌、耕作制度、栽培措施是影响该区小麦-杂草群落结构及分布的主要因素。

STUDIES ON THE WHEAT WEEDS COMMUNITIES IN WHEAT FIELDS IN JINGQU BASIN OF ZHEJIANG PROVINCE

In the wheat fields of thirteen counties (or cities) of Jingqu basin in Zhejiang Province, 724 random sampling fields of 80 sites were surveyed in detail by vision of seven grades to obtain the weed damage index, these data were analysed by the maximal tree method of fuzzy graphy theory. Study shows: there are four main Triticum aestivum-weeds communities in wheat fields, Which are Triticum aestivum-Alopecurus aequalis-Stellaria alsine-Malachium aquaticum-Polygonum persicaria community in the rice-earth fields with the rotation of wheat and rice, Triticum aestivum-Avena fatua-Polygonum persicaria-Capsella burapastoris-Galium aparine var. tenerum community in damp-sandy-soil fields near the rivers with the rotation of wheat and soybean (or sweet potato or cotton or peanut), Triticum aestivum-Galium aparine var. tenerum-Avena fatua-Veronica persica community in lower-subdued red earth dryland fields with the rotation of wheat and soybean (or sweet potato or cotton or peanut), Triticum aestivum-Juncus alatus-Ranunculus sieboldii-Alopecurus aequalis-Polygonum persicaria community in sand bog fields. Investigations indicate that the types of soil, pH, cultivation regime and topography are the main factors influencing the distribution and structure of Triticum aestivum-weeds communities in wheat fields in Jingqu basin.