除草剂在加州旱地多年生牧草上的应用提高了饲料产量和作物盖度

IF 2.4 3区 环境科学与生态学 Q2 ECOLOGY
Josh Davy , Ryan Hill , Larry Forero
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引用次数: 0

摘要

加州山麓一年生牧场的夏季休眠多年生草必须加以管理,以保持生产力。杂草入侵会降低牧草质量和林分持久性,而且缺乏关于杂草管理最佳做法的信息。建立了吲哚氟仑、利姆磺隆和氨基吡啶类除草剂对9种多年生牧草的药效试验。在种植7年后施用除草剂,对作物盖度和牧草生物量的影响进行了两个生长季节的评估。处理对杂草种群、多年生牧草盖度和牧草生物量的影响因种而异。一般情况下,利姆磺隆处理促进了medusahead的入侵,黄星蓟只在未种植的对照中大量繁殖,而氨基吡啶和茚地夫兰处理减少了大麦的入侵。多年生牧草盖度最低的典型是未处理对照,而生物量最低的典型是茚地氟姆处理。茚地夫兰处理提高了小麦草和果园草品种的盖度。施硝磺隆处理的哈定草品种盖度最高,施硝磺隆70 g的“Perla”草总生物量和盖度最高。氨毒处理对作物盖度的影响不尽相同,但通常通过促进一年生黑麦草的生长来提高牧草生物量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Herbicide Applications in California Dryland Perennial Grasses Improve Forage Yield and Crop Coverage
Summer dormant perennial grasses in the annual rangelands of California’s foothills must be managed to maintain productivity. Weed invasion can reduce forage quality and stand persistence and information is lacking on best practices for weed management. Trials were established to assess the effects of indaziflam, rimsulfuron, and aminopyralid herbicides on nine perennial grass species. Herbicide treatments were applied seven years after planting and effects on crop coverage and forage biomass production were evaluated for two growing seasons. Treatment effects on weed populations, perennial grass coverage, and forage biomass varied by planted species. Generally, medusahead invasion was promoted by rimsulfuron treatments, yellow star-thistle was only abundant in the unplanted control, and hare barley was reduced by aminopyralid and indaziflam treatments. The lowest perennial grass coverage was typically observed in the untreated control and the lowest biomass was typically associated with indaziflam treatments. Coverage of wheatgrass and orchard grass varieties was improved by indaziflam treatments. Coverage of Harding grass varieties tended to be greatest in plots treated with rimsulfuron and the highest overall biomass and coverage was achieved in "Perla" koleagrass treated with 70 g ai ha-1 rimsulfuron. Aminopyralid treatments resulted in variable crop coverage effects, but often improved forage biomass through promotion of annual ryegrass.
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来源期刊
Rangeland Ecology & Management
Rangeland Ecology & Management 农林科学-环境科学
CiteScore
4.60
自引率
13.00%
发文量
87
审稿时长
12-24 weeks
期刊介绍: Rangeland Ecology & Management publishes all topics-including ecology, management, socioeconomic and policy-pertaining to global rangelands. The journal''s mission is to inform academics, ecosystem managers and policy makers of science-based information to promote sound rangeland stewardship. Author submissions are published in five manuscript categories: original research papers, high-profile forum topics, concept syntheses, as well as research and technical notes. Rangelands represent approximately 50% of the Earth''s land area and provision multiple ecosystem services for large human populations. This expansive and diverse land area functions as coupled human-ecological systems. Knowledge of both social and biophysical system components and their interactions represent the foundation for informed rangeland stewardship. Rangeland Ecology & Management uniquely integrates information from multiple system components to address current and pending challenges confronting global rangelands.
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