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首页> 外文期刊>Forage and grazinglands >How Winter Annual Forage Legumes Persist InDiverse Soil Moisture Environments of a SemiaridRegion
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How Winter Annual Forage Legumes Persist InDiverse Soil Moisture Environments of a SemiaridRegion

机译:冬季一年生牧草豆科植物如何在半干旱地区的不同土壤水分环境中生存

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Varied microenvironments complicate use of legumes in marginal lands. Sevenannual cool-season legume species, sown for natural reseeding, were rated forbloom and germination dates, fall vigor, and spring percentage stand atTucumcari, NM. Soil moisture effects were: furrow-irrigated once to promotegermination, irrigated monthly April to October, irrigated monthly year-round,and poorly drained, saline/sodic soil. The study was a strip-split-split-split plotover four years having four replications nested within each soil moisture stripplot. Trifolium nigrescens did not establish in any soil moisture situation. Only T.alexandrinum established > 20% stand in poorly drained soil; however, neither itnor T. vesiculosum naturalized in any strip plot. Naturalized stand percentagedeclined differently across years for species and soil moisture treatments. T.incarnatum reseeding failed in 1999; the others, except T. vesiculosum and T.alexandrinum, reseeded throughout the test, Vicia sativa being most consistentacross soil moisture treatments, but at lower levels of stand establishment thanother species. T. alexandrinum might serve for annually replanted cover in poorlydrained, saline/sodic soils. T. hirtum and V. villosa also might be useful.
机译:多样的微环境使边缘地区豆类的使用复杂化。在新墨西哥州的图克姆卡里,为自然播种而播种的七种凉季豆类物种的花期和发芽日期,秋季活力和春季百分率被定为新墨西哥州的图克姆卡里。土壤水分的影响是:犁沟灌溉一次以促进发芽,4月至10月每月灌溉一次,全年整月灌溉,盐水/钠盐土壤排水不畅。这项研究是在过去的四年中,每条土壤湿度条形图中嵌套有四次重复的条带-分裂-分裂-分裂绘图。黑麦草在任何土壤水分情况下都没有建立。在排水不畅的土壤中,只有建立的T. alexandrinum> 20%。但是,无论在任何条形图上,它都不能归巢。对于物种和土壤水分处理,归化林分百分比随着年份的下降而有所不同。 T.incarnatum播种于1999年失败;在整个试验过程中,除豌豆毛虫和亚历山大草外,其余种均重新播种,其中豌豆在整个土壤水分处理中最为一致,但与其他物种相比其林分建立水平较低。亚历山大草(T. alexandrinum)可能每年在排水不畅,盐碱/钠盐土壤中被重新种植。 T. hirtum和V. villosa也可能有用。

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