复合药肥“克青封”的研究

Study of Preparation of Compound Herbicide- Fertilizer of Keqingfeng

青封灾是高寒山区水稻常见灾害。收获时稻株依然色泽青绿，不能正常成熟，不实粒率高，稻谷减产十分严重。“克青封”是我们１９９１及１９９２年在安徽省岳西县为御防青封灾研制成功的复合药肥，使用其最佳配方，效果显著，提前４～７天齐穗，提早７～１１天成熟，增产１５％以上。

Qingfengzai was the generally occurred distress of rice in the high and cold mountainous area.Rice plant grew still green even in its ripening stage.It gave the result of rice grains being not regularly matured.The unfilled ratio of rice grain was higher,the rice grains yield was greatly decreased.Method of distress control had been studied in Yuxi Xian of Anhui in 1991 and 1992,Compound herbicide-Fertilizers of Keqingfend had been successfully prepared,in make use of its optimal proportion,the full-heading stage and the maturing stage of rice plant were promoted 4～7 days and 6～11 days respectively,and the grain yied increasing above 15% was obtained.