论文部分内容阅读
什么是测土施肥技术? 农作物除从空气和水中吸收碳、氢、氧等营养外,还要从土壤中吸取氮、磷、钾、硫、钙、镁……等营养元素,来满足生长发育的需要。然而,光靠土壤本身提供的上述营养元素,是不能满足农作物增产增收的需要。常言道“庄稼一枝花,全靠肥当家”,这句谚语的意思是必顶有足够的肥料,补充土壤中营养的不足才能使农作物获得高产。但是怎样施肥才算合理呢?怎样才能达到合理施肥呢?当前这种根据土壤中养分含量来决定施肥的种类与数量的技术,就是测土施肥技术。应用这种技术,能够做到缺啥补啥,缺多少补多少,根据不同土壤和作物提出合理施肥的处方。它的作用有①提供一定土壤、一定作物品种和一定气候条件下接近实际需要的养分品种和养分数量,防止盲目施肥,造成养分缺乏或过量而减产。
What is the soil fertilization technology? In addition to crops from the air and water absorption of carbon, hydrogen, oxygen and other nutrients, but also from the soil absorption of nitrogen, phosphorus, potassium, sulfur, calcium, magnesium ...... and other nutrients to meet the growth and development Need. However, the above nutrient elements alone provided by the soil itself can not meet the needs of increasing crop yield. As the saying goes, “a crop of flowers, all by the fat,” the saying proverb means that there must be enough fertilizer to supplement the lack of nutrition in the soil to make crops yield high. But how fertilization is reasonable? How can we achieve reasonable fertilization? The current technology to determine the type and amount of fertilization according to the nutrient content of soil is soil testing and fertilization technology. Application of this technology, can make up what Han lack, how many lack of complement, according to different soil and crop proposed fertilization prescription. Its role is to provide a certain amount of soil, crop varieties and certain climatic conditions close to the actual needs of nutrients and nutrients to prevent blindly fertilizing, resulting in lack of nutrients or excess production.