编辑同志:近年来,向日葵在我县迅速发展,到1979年已扩大到7.5万亩.许多社队由于种向日葵,一年改变了贫困面貌.但大多社队将向日葵种在中下等肥力的地块上,很少施肥.向日葵是一种吸肥力很强的作物,如果连作二、三年后,产量会急剧下降.法库县秀水河子公社八家子二队,1977年在轻盐碱地上种150亩向日葵,亩产110斤,1978年连作,产量下降40%.因此,种向日葵一定要注意轮作倒茬,合理安排茬口、合理施肥,做到 Editing Comrades: In recent years, sunflowers have been rapidly developing in our county and have been expanded to 75,000 mu in 1979. Many communes have changed their poverty year by year because of planting sunflowers, but most of the communes and sunflowers will grow in middle and lower fertility On the plot, very little fertilizer. Sunflower is a highly fertile crops, even if two or three years in a row, the output will drop sharply. Faku County Xiushuihezi eight eight sub-team, in 1977 in light saline alkali On the 150 acres of sunflower, per mu 110 kg, production continued to decline in 1978, 40% .Therefore, the kind of sunflower must pay attention to crop rotation, reasonable arrangements stubble, fertilization, do