一次施肥量不宜过大,在干旱时如果一次性施肥量大,干旱后遇到大雨容易被冲走。肥料深施,以水压肥。在干旱情况下,如果仅把肥施在面上,肥料易挥发。如果干旱后遇洪水暴雨,还容易被雨水冲走。所以应尽量深施化肥,施后择机灌水压肥以保持肥效。注意肥料合理搭配,尤其是钾肥、硼肥许多研究资料表明,适宜的钾素可提高根冠比,增强作物吸水能 Once the amount of fertilizer should not be too large, if the amount of a one-time fertilizer in the drought, drought after the encounter easily washed away. Fertilizer deep facilities to water pressure fertilizer. In arid situations, fertilizers are volatile if only applied to the surface. If the drought after a flood, but also easily washed away by the rain. Therefore, we should try to fertilize fertilizer, fertilizer and fertilizer after the election to maintain fertilizer efficiency. Note that with a reasonable fertilizer, especially potassium, boron fertilizer, many research data show that the appropriate potassium can increase the ratio of root and shoot, and enhance water absorption