随着农业生产的迅速发展,杂交水稻的推广和三熟制面积的扩大,普遍感到肥料不足。因此,应该设法开辟新肥源,增施肥料,以提高单产。在紫色页岩分布的丘陵地区,大种乌桕,能变荒山为宝山。乌桕饼是一种优质的有机肥料。据分析,100斤乌桕饼含氮5.95%,含磷2.32%,含钾1.34%,相当于35斤碳酸氢铵、13斤过磷酸钙、2.7斤氯化钾化肥 With the rapid development of agricultural production, the popularization of hybrid rice and the expansion of three-cropping system, the general feeling of insufficient fertilizer. Therefore, we should try to open up new fertilizers and increase fertilizers to increase yield. Hilly areas in the distribution of purple shale, a large species of black-crowned, can change the barren mountain Baoshan. Wu cake is a high-quality organic fertilizer. According to the analysis, 100 pounds of Wuzhu cake containing 5.95% nitrogen, 2.32% phosphorus, potassium 1.34%, equivalent to 35 kg of ammonium bicarbonate, 13 kg of superphosphate, 2.7 kg of potassium chloride fertilizer