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前言由于近年农业技术的进展,通过灌溉系统进行施肥已成为可能,这种方法叫做“灌溉施肥法”。其优点是:1.节省施肥的费用和劳力;2.肥料要素已呈溶解状态,因而比干施于土表的能更快地为植株根系所吸收利用;3.在灌溉时间的选择上有高度灵活性,使安排施肥更为容易。但可能存在的缺陷是:1.如灌溉系统设计不当,会使肥料分布范围不合乎要求,从而效果不佳;尤其是使用滴灌及其它微量灌溉系统的地方,由于只能灌及局部
Preface Due to advances in agricultural technology in recent years, it has become possible to apply fertilizers through irrigation systems. This method is called “irrigation and fertilization method”. Its advantages are: 1. Save fertilizer costs and labor; 2. Fertilizer elements have been dissolved, and thus applied to plant roots faster than the dry soil surface absorption; 3. In the choice of irrigation time there Highly flexible, making it easier to arrange fertilizers. However, the possible shortcomings are as follows: 1. Improper design of irrigation systems can make the distribution range of fertilizers unsatisfactory and thus ineffective. Especially in places where drip irrigation and other micro-irrigation systems are used,