Effects of weed abundance and frequency of hand weeding on the establishment of transplanted Imperata cylindrica
Effects of weed abundance and frequency of hand weeding on the establishment of transplanted Imperata cylindrica
复制标题
杂草丰度及人工除草频率对移栽白茅建植的影响
DOI：
10.1007/s11355-019-00398-3
复制
发表时间：
2020
影响因子：
2
通讯作者：
Nemoto Masayuki
中科院分区：
文献类型：
--
作者：
Yamada Susumu;Nemoto Masayuki
白茅是亚洲一些国家草地的重要组成部分。其强劲的根茎伸长使植物能够迅速覆盖裸露的地面，使其成为重新植被项目的候选者。在这些项目中，初始和后续的管理实践往往有所不同。初期管理战略对于鼓励目标物种迅速覆盖十分重要。我们测试了最初的手除草对I的影响。cylindricacover和杂草生长超过2年。将两种类型的土壤（A和B）散布在最近建造的河堤上，深度为10 cm。土壤A和B都是贫营养和高pH（> 7.0）的土壤。地块每年手工除草一次或两次（分别为W1和W2处理），或割草但不除草（M处理），重复四次。I. cylindrica进行了介绍。在W2处理下，土壤A中以圆柱形占优势，第2年覆盖率为50%。相反，I.在土壤B中，由于杂草假高粱占优势，无论处理如何，圆柱形都不能在土壤中建立。土壤B包括S. halepense，从根状茎的旺盛生长可能是其优势的主要原因。halepenseseedlings发芽在这两种土壤中，但成功地根除除草时，在不到1个月的年龄。因此，为了成功地重新植被，土地管理者应该使用不含匍匐根茎的土壤。哈利潘塞如果没有根茎，每年人工除草两次，持续2年，就足以建立I。圆柱形的
Imperata cylindricais an important component of grasslands in several Asian countries. Its vigorous rhizome elongation enables the plant to quickly cover bare ground, making it a candidate for revegetation projects. In these projects, initial and subsequent management practices often differ. Initial management strategies are important for encouraging rapid cover by the target species. We tested the effects of initial hand weeding onI. cylindricacover and weed growth over 2 years. Two types of soil (A and B) were scattered on a recently constructed river embankment at a depth of 10 cm. Both soils A and B are nutrient-poor and high (> 7.0) pH. Plots were hand-weeded once or twice a year (W1and W2treatments, respectively), or mowed but not weeded (M treatment) with four replications. Plug plants ofI. cylindricawere introduced.I. cylindricabecame dominant in soil A with the W2treatment, with 50% cover in year 2. Conversely,I. cylindricafailed to establish in soil B regardless of treatment, due to dominance of the weedSorghum halepense. Soil B included creeping rhizomes ofS. halepense, and vigorous growth from rhizomes is likely a major reason for its predominance.S. halepenseseedlings germinated in both soils, but were successfully eradicated when weeded at less than 1 month of age. Thus, for successful revegetation, land managers should use soil that does not contain creeping rhizomes ofS. halepense. If rhizomes are not present, hand weeding twice a year for 2 years is sufficient for establishment ofI. cylindrica.