国外开发出旱地造林新技术根据某些聚合物如聚丙烯基聚合物、丙烯甲基和乙烯基乙酸盐的接技共聚物、聚乙烯乙酸酯共聚物、淀粉基聚合物、异丁烯和马来酸的共聚物、按甲基纤维素等所特有的吸水能力（吸水能力相当于本身重量的５００—１０００倍），英国科学家把吸满水份的... New technologies for dryland afforestation development in foreign countries According to certain polymers such as polypropylene-based polymers, graft copolymers of propylene methyl and vinyl acetate, polyvinyl acetate copolymers, starch-based polymers, isobutylene and horse To acid copolymer, according to methyl cellulose and other unique water absorption capacity (water absorption capacity equivalent to 500-1000 times its own weight), British scientists to suck water ...