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向日葵近年来发展迅速,辽宁省1981年种植面积达277万亩之多,仅次于大豆,已成为主要油料作物。但由于向日葵在我国作为油用而大面积栽培的历史短、经验少、产量不高不稳。其中主要减产原因是病害所至。在目前对向日葵病害尚没有高效农药防治和其它办法的情况下,通过简而易行的播期调节,使向日葵容易感病的发育阶段躲过病害发生高峰时期,以达到尽量减少病害对产量影响的目的。 本试验于1980—1981年在辽宁省半干旱向日葵产区设点进行。 本文仅从播期与向日葵发病关系方面进行论述。
Sunflower has developed rapidly in recent years. Liaoning Province, with a planting area of more than 2.77 million mu in 1981, is second only to soybean and has become a major oilseed crop. However, since sunflower is used as a large-scale cultivation of oil in our country, its history is short, its experience is poor, its output is not high and unstable. The main reason for the decrease is the disease. In the current sunflower disease is not yet highly efficient pesticide control and other circumstances, by easy to adjust the sowing date, susceptible to sunflower susceptible stage of the disease escaped the peak period, in order to minimize the impact of disease on the yield the goal of. The experiment was conducted in the semi-arid sunflower area of Liaoning Province from 1980 to 1981. This article only discusses the relationship between sowing date and sunflower.