Yield and Botanical Composition of Rhizoma Peanut‐Grass Swards Treated with Herbicides
Yield and Botanical Composition of Rhizoma Peanut‐Grass Swards Treated with Herbicides
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除草剂处理花生草田的产量和植物成分
DOI：
10.2134/agronj1999.916956x
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发表时间：
1999
期刊：
影响因子：
2.1
通讯作者：
L. Sollenberger
中科院分区：
文献类型：
--
作者：
E. Valencia;M. Williams;L. Sollenberger
杂草是花生根茎（RP）（Arachis glabrata Benth.）日益严重的问题，一种暖季多年生饲料豆科植物。该田间研究的目的是测量草甘膦[N-（膦酰基甲基）甘氨酸]在1.12、2.24或3.36 kg a.i. ha-1和三氯吡氧乙酸{[（3，5，6-三氯-2-吡啶基）氧基]乙酸]，0.56、1.12或1.68 kg a.i. ha-1对杂草丛生的RP-草地在施用后2个月和4个月的干物质（DM）产量和植物组成的影响。墨西哥茶（Chenopodium ambrosioides L.）和白茅[Imperata cylindrica（L.）P. Beauv.]是最常见的杂草在所有的利率，减少墨西哥茶DM 2个月后，在这两年的应用。然而，在施用后4个月观察到现有MT植物的实质性恢复，但速率很高。在1995年或1996年，甘草对茅根草或其他草没有影响。在这两年中，根茎花生DM随着草甘膦施用率的增加而下降。在低剂量草甘膦（1.12 kg ha-1）下，施用4个月后，RP有一定程度的恢复。可食用DM（RP +其他草）减少，由于草甘膦处理仅在高草甘膦率。在这两年中，三氯吡氧乙酸是有效的，减少墨西哥茶DM 2个月后，有限的恢复治疗植物4个月后，应用程序。在这两年中，在三氯吡氧乙酸处理中，白茅草和其他草增加，可能是由于墨西哥茶的竞争减少。1995年施用三氯吡氧乙酸后2和4个月，花生根干物质含量随着施用量的增加而降低，但1996年仅在施用后2个月观察到这种效应。三氯吡氧乙酸的应用对可食用DM的影响不大，但这是其他草对RP的替代效应的结果。三氯吡氧乙酸和草甘膦都可以在杂草丛生的RP站有用，但草甘膦在测试率是不是有效的三氯吡氧乙酸在控制墨西哥茶。
Weeds are an increasing problem in rhizoma peanut (RP) (Arachis glabrata Benth.), a warm-season perennial forage legume. The objective of this field study was to measure the effect of glyphosate [N-(phosphonomethyl)glycine] at 1.12, 2.24, or 3.36 kg a.i. ha -1 and triclopyr {[(3,5,6-trichloro-2-pyridinyl)oxy]acetic acid] at 0.56, 1.12, or 1.68 kg a.i. ha -1 applied in the summer on dry matter (DM) yield and botanical composition of weed-infested RP-grass swards at 2 and 4 mo after application. Mexican-tea (Chenopodium ambrosioides L.) and cogongrass [Imperata cylindrica (L.) P. Beauv.] were the most common weeds. Glyphosate, at all rates, reduced Mexican-tea DM 2 mo after application in both years. However, substantial recovery of existing MT plants was observed 4 mo after application at all but the high rate. Glyphosate had no effect on cogongrass or other grasses in 1995 or 1996. In both years, rhizoma peanut DM declined as the rate of glyphosate increased. Some recovery of RP was noted at the low (1.12 kg ha -1 ) rate of glyphosate by 4 mo after application. Edible DM (RP + other grasses) was reduced due to glyphosate treatment only at the high glyphosate rate. In both years, triclopyr was effective in reducing Mexican-tea DM 2 mo after application with limited recovery of treated plants 4 mo after application. Cogongrass and other grasses increased in the triclopyr treatments in both years, possibly due to reduced competition from Mexican-tea. Rhizoma peanut DM decreased as the rate of triclopyr increased in 1995 at 2 and 4 mo after application, but this effect was observed only at 2 mo after application in 1996. Triclopyr application had little effect on edible DM, but this was a consequence of the substitution effect of other grasses for RP. Both triclopyr and glyphosate can be useful in weed-infested RP stands, but glyphosate at the rates tested was not as effective as triclopyr in controlling Mexican-tea.