Influence of Herbicides on Yield and Botanical Composition of Alfalfa Hay1
Influence of Herbicides on Yield and Botanical Composition of Alfalfa Hay1
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除草剂对苜蓿干草产量和植物组成的影响1
DOI：
10.2134/agronj1983.00021962007500020017x
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发表时间：
1983
期刊：
影响因子：
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通讯作者：
R. Fawcett
中科院分区：
文献类型：
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作者：
T. Dutt;R. Harvey;R. Fawcett
多年生杂草经常危害紫花苜蓿(Medicago sativa L.)斯瓦兹。虽然已确定除草剂可以控制这些杂草，但紫花苜蓿对这些除草剂的耐受性以及对干物质产量和植物学和化学成分的影响在很大程度上是未知的。因此，在Mt.附近的Dodgeville粉壤土(典型的Argiudoll细粉土覆盖在粘性、混合、中质)土壤上进行了实地研究。威斯康星州霍雷布1974年，在威斯康星州维罗纳附近的普莱诺粉质壤土(典型的Argiudoll细粉砂质混合中质)土壤上。1976年，为了比较7种除草剂单独使用或与代草胺[N(1，1-二甲基丙炔基)-3，5-二氯苯甲酰胺]配伍使用对被小麦草侵染的紫花苜蓿的除草效果。Beauv.]和几种多年生阔叶杂草。测定了牧草产量和植物学组成。[2-[4-氯-6-(乙氨基)-S-三氮-2-氨基]-2-甲基丙腈]，灭草津(2-sec-butylamino-4-ethylamino-6-methoxy-s-triazine)，[4-amino-6-tert-butyl-3-(methylthio)-as-triazin-5(4H)-one]，和S-6044[N-苄基-N-异丙基三甲基乙酰胺/2-cyclopropanecar-boxamide-5-(2-chloro-1，1-dimethylethyl)-1，3，4-thiadiazole]，在秋季积极种植的牧场上应用，在接下来的季节里，至少在一次割草或一个地点减少了紫花苜蓿的产量。丙草胺提高了紫花苜蓿总产量。1974年，蒲公英(Taraxacum office inale Weber.)和白蜡梅[Berteroa incana(L.)DC。]当奎克草被代森胺抑制时，种群数量增加。所有除草剂都没有减少蒲公英和白花蒲公英的种群数量。黄色火箭(Barbareacumgaris R.Br.)种群减少的药物有：赛克布顿1.8kg.hm2，特雷伯利(3-特丁基-5-氯-6-甲基尿嘧啶)0.9kg.hm2，克草津2.3kg.hm2，苯达松[3-isopropyl-1H-2，1，3-benzothiadiazin-4-(3H)-one 1.7kg.hm2。所有处理都没有提高牧草总产量。
Perennial weeds frequently infest alfalfa (Medicago sativa L.) swards. While herbicides have been identified that control these weeds, alfalfa tolerance to these herbicides and effects on dry matter yields and botanical and chemical composition are largely unknown. Thus, field studies were conducted on a Dodgeville silt loam (Typic Argiudoll fine-silty over clayey, mixed, mesic) soil near Mt. Horeb, Wis. in 1974 and on a Plano silt loam (Typic Argiudoll fine-silty, mixed, mesic) soil near Verona, Wis. in 1976 to compare the effects of seven herbicides applied alone, or in combination with pronamide [N (1,1-dimethylpropynyl)-3,5-dichlorobenzamide] to alfalfa swards which had been colonized with quackgrass [Agropyron repens (L.) Beauv.] and several perennial broadleaf weed species. Forage yield and botanical composition were determined. Secbumeton (2-sec-butylamino-4-ethylamino-6-methoxy-s-triazine), cyanazine {2-[[4-chloro-6-(ethylamino) -s-triazin-2-yl] amino]-2-methylpropionitrile], metribuzin [4-amino-6-tert-butyl-3-(methylthio)-as-triazin-5(4H)-one], and S-6044 [N-benzyl-N-isopropyltrimethylacetamide / 2-cyclopropanecar-boxamide-5-(2-chloro-1,1-dimethylethyl)-1,3,4-thiadiazole], applied to actively growing swards in the fall reduced alfalfa yields in at least one cutting or at one location during the following season. Pronamide increased the total alfalfa yield. In 1974, common dandelion (Taraxacum officinale Weber.) and hoary alyssum [Berteroa incana (L.) DC.] populations increased when quackgrass was suppressed with pronamide. None of the herbicides reduced common dandelion and hoary alyssum populations. Yellow rocket (Barbarea vulgaris R. Br.) populations were reduced by secbumeton at 1.8 kg/ha, terbacil (3-tert-butyl-5-chloro-6-methyluracil) at 0.9 kg/ha, metribuzin at 2.3 kg/ha, and bentazon [3-isopropyl-1H-2,1,3-benzothiadiazin-4-(3H)-one 2,2-dioxide] at 1.7 kg/ha. None of the treatments increased total forage yields.