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油菜是我区主要油料作物,其栽培面积占油料作物总面积的50％。但亩产长期徘徊在50～60斤之间。从1974年以来,我所在开展油菜栽培试验中,连续两年发现冬前大量死苗,开春大量落花落蕾,成熟收割时仍开花不断,实收结果,生长正常的田块亩产227.3斤,发病田亩产仅65.3斤,减产71.3％。经过调查研究,查阅资料,基本确定是甘兰型油菜“花而不实”症所改。据外地研究证明,造成这种病的原因是由于土壤缺硼所引起的一种生理机能病害。此病在我区主产油菜的石泉、汉阴、安康、平利等县都有。为此,于1976年秋
Rape is my main oil crops, the cultivation area of oil crops accounted for 50% of the total area. However, long-term hovering in the 50 to 60 pounds per mu. Since 1974, I have conducted rape cultivation experiments for two consecutive years and found that a large number of dead seedlings before winter, a large number of spring flowers falling buds, flowering continues to flowering mature harvest, harvest results, the growth of normal plots yield 227.3 kg, The yield per mu only 65.3 kg, 71.3% reduction. After investigation and study, access to information, basically determine the type of Brassica napus “flower and not real” disease changed. According to field studies prove that the cause of this disease is due to boron deficiency caused by a physiological disease. The disease is mainly produced in our district, Shiquan, Hanyin, Ankang, Pingli and other counties have. To this end, in the autumn of 1976