人工除草劳动强度大，次数多，耗资大。为探讨省工、省时、节资的现代化苗圃管理新技术，我们于1992年～1994年进行了新型化学除草剂“果尔”防除林业苗回地杂草的试验研究。3年来，我们分别对黑杨派无性系杆插苗、大叶黄杨移植苗、侧柏播种苗、水杉留床苗、银杏播种苗、幼龄苹 Artificial weeding labor intensity, frequency, costly. In order to explore the new technology of modern nursery management which is provincial, provincial and capital-saving, we conducted a pilot study on the control of weeds from the new chemical herbicide “Goer” in 1992-1994. In the past 3 years, we have respectively conducted researches on clonal propagation of Clonal Seedlings of Poplar, Populus euphratica, Platycladus orientalis, Seedlings of Metasequoia, Seedlings of Ginkgo biloba,