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当前位置: 首页 > 文章 > 稻田野慈姑生物学特性及其对水稻产量影响 福建农业学报 2011,26 (4) 101-104
Position: Home > Articles > Biological Characteristics of and Rice Yield Affected by Sagittaria trifolia Linn. Fujian Journal of Agricultural Sciences 2011,26 (4) 101-104

稻田野慈姑生物学特性及其对水稻产量影响

作  者：
王长方;王俊;陆永良;游泳;陈峰;胡进锋;余柳青
单  位：
福建省农业科学院植物保护研究所;中国水稻研究所
关键词：
野慈姑;生物学特性;水稻;产量
摘  要：
在晚季稻田自然生长条件下,观测野慈姑的生物学特性,研究其不同密度对移栽水稻产量影响,结果表明:晚季稻田耙平后约30d野慈姑出苗达高峰期,历期约46d;野慈姑绿叶和总叶数呈逐渐上升—稳定—下降的消长动态,新叶生长速度为每3d平均长0.5～0.8叶,新叶生长过程大致可分为3个阶段。不同生长期叶片平均长度、宽度分别为8.45～15.14cm和1.23～2.59cm;平均株高为40.53cm,根数达44.73条;未见野慈姑有分枝。开花和结果历期分别约为28d和12d,开花和结果盛期,每株平均花果数分别为2.15朵和1.85个。其球茎主要分布在5～15cm土层中,约占70%,且直径最大。不同密度对水稻实际减产达2.94%～23.53%,减产幅度随野慈姑密度的增加而提高,当每平方米达20、25株时,对水稻产量影响达显著水平。
译  名：
Biological Characteristics of and Rice Yield Affected by Sagittaria trifolia Linn.
作  者：
WANG Chang-fang1,WANG Jun1,LU Yong-liang2,YOU Yong1,CHEN Feng1,HU Jin-feng1,YU Liu-qing2(1.Institute of Plant Protection,Fujian Academy of Agricultural Sciences,Fuzhou,Fujian 350013,China; 2.China National Rice Research Institute,Hangzhou,Zhejiang 310006,China)
关键词：
Sagittaria trifolia;biological characteristics;rice;yield
摘  要：
Biological characteristics of Sagittaria trifolia Linn.were observed in the fields of the late-season rice.Their effects on the rice yield were evaluated.Most S.trifolia seedlings sprouted 30 days after the late-season rice fields were plowed and leveled.The sprouting might last for 46 days.The numbers of green leaves and total leaves on the plant provided a quantifiable index for the weed growth.They increased,stabilized and decreased during the weed's lifespan,while the number of withered leaves always increased with age.On average,0.5-0.8 new leaves appeared every 3 days.The average length and width of the leaves ranged from 8.45 to 15.14㎝and 1.23 to 2.59㎝,respectively.The average stem length reached 40.53 cm,and the average number of roots came to 44.73.Branching was not found in S.trifolia.The durations of bloom and fruit were 28-day and 12-day,respectively;and the average number of flowers and fruits were 2.15 and 1.85,respectively.About 70% of the corms of S.trifolia were found in 5 to 15 cm beneath the surface of soil.The rice yield could be reduced by 2.94% to 23.53% depending on the growth density of the weed.When the number of S.trifolia was 20 to 25 per square meter,the weeds started to induce a significant on rice production.

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