山东临邑引进新菜种政府先试种

山东临邑县有蔬菜面积20万亩、大棚8万个。过去．菜农大多种的是大路菜．增产不增收。近年来．该县通过引进优质品种和先进技术．提高菜农的收益。但在引进新品种、新技术时．众多菜农却疑虑不前．怕担风险。对此．该县通过风险由政府来担的方式使问题迎刃而解．首先．该县不惜代价引进国内外“顶级”

新菜种──苦苣菜及其栽培技术

苦苣菜（ＣｉｃｈｏｒｉｕｍｅｎｄｉｖｉａＬ．）为菊科草本植物，全国各地广泛分布，山西省各地也较常见。野生苦苣生于田野、路旁、村舍附近，是一种耐高、低温，耐湿润、干旱，耐肥沃、瘠薄，适应性广的蔬菜。其食用部位每１００克嫩苗、嫩叶中含有胡萝卜素７．６６毫...

Analysis of Yield and Disease Resistance Traits of New Winter Rapeseed Varieties over the Past Twenty Years in China

Based on the results of the national regional trail for winter rapeseed in four groups,including the upper reaches,middle reaches and lower reaches of Yangtze River and Huang-Huai region in the past twenty years,new varieties of winter rapeseed showed upward trend in average yield,the yield level in Huang-huai group was higher than other groups.The changes of average effective pods per plant were not significant in any group,but the number of grain per pod and 1 000-grain weight showed increase trend.However,the increment of grains per pod in three Yangtze River groups was higher than that in Huang-Huai River group,while the increment of 1 000-grain weight was just opposite.The incidence rate of Sclerotinia sclerotiorum and viral disease in new varieties of winter rapeseed obviously decreased,and the incidence rate of S.sclerotiorum decreased lower than 5%.Genetic improvement for winter rapeseed should be focus on the number of grain per pod and 1 000-grain weight in the future,and yield level of new varieties in all four groups is expected to increase.

上海开发出耐高温小青菜

上海蔬菜种业工程技术研究中心近日新开发成功的耐高温小青菜已播种，生长25天即可上市。在37～38℃气温下，新菜种仍可正常生长，坚持一周。即使达到40℃极端高温，也不会像常规品种那样“蔫”了。