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三、施肥儿好要奶,稻好要肥(桐乡) 田靠壅力,人靠吃食(乐清) 一担河泥一担谷(瑞安) 水稻是高产作物,可是缺少肥料就不能充分发挥它的增产潛力。据科学研究分析,生产800斤稻谷的水稻大概要从土壤里吸取氮素15～20斤、磷素10斤、钾素20斤左右,这大约相当于40～50担廐肥的三要素含量。当然,我们并不能按生产指标,机械地照这个比例推算施肥量。一方面因为施入田里的肥料常不能在当季全部被水稻吸收,施迟效肥料时更是如此;另一方面,土壤肥瘦不同,能供应的养料也多少不一。虽然,具体的施肥量要因地制宜,但在一定的范围内,
Third, the fertilizer is good to milk, rice is good to fertilizer (Tongxiang) field by force, people rely on food (Yueqing) a Tam River Tamdan (Ryan) rice is a high-yielding crops, but the lack of fertilizer can not give full play to its Yield potential. According to scientific analysis, rice yielding 800 kilograms of rice is about 15 to 20 kilograms of nitrogen, 10 kilograms of phosphorus and 20 kilograms of potassium, which is roughly equivalent to 40 to 50 percent of the three elements of fat. Of course, we can not calculate the amount of fertilizer mechanically according to the production index according to this ratio. On the one hand, fertilizers applied to the fields can not always be absorbed by rice during the season, especially when they are applied at a later time. On the other hand, the amount of nutrients that can be supplied varies depending on the amount of fertilizer applied. Although the specific amount of fertilizer to suit local conditions, but in a certain range,