内 容 简 介 甲壳素是从虾、蟹壳中提取的一种天然高分子。壳聚糖是甲壳素脱乙 酰基的产物。本书在系统介绍甲壳素和壳聚糖的基本理化性能的基础上，

Content 1. Bottle neck in high use efficiency of water and fertilizer in greenhouse vegetable production 2. Fertigation: basic demand to improve high UE of water