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首页> 外文期刊>Canadian Journal of Plant Science >Late summer forage yield, nutritive value, compatibility of warm- and cool-season grasses seeded with legumes in western Canada
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Late summer forage yield, nutritive value, compatibility of warm- and cool-season grasses seeded with legumes in western Canada

机译：夏季饲料产量，营养价值，暖和凉爽的季节草播种在加拿大西部豆类

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摘要

In late summer and fall, quality and quantity of forage are important for weight gain by grazing animals in western Canada. The objective of this study was to evaluate forage nutritive value, dry matter (DM) yield, and compatibility of crested wheatgrass [Agropyron cristatum (L.) Gaertn.], meadow bromegrass (Bromus riparius Rehm.), green needle grass [Nasella viridula (Trin.) Barkworth], northern wheatgrass [Elymus lanceolatus (Scribn. & J.G. Sm.) Gould], western wheatgrass [Pascopyrum smithii (Rydb.) Barkworth & D.R. Dewey], Russian wildrye [Psathyrostachys juncea (Fisch.) Nevski], big bluestem (Andropogon gerardii Vitman), or switchgrass (Panicum virgatum L.) in eight grass monocultures, and their binary mixtures with alfalfa (Medicago sativa L.), sainfoin (Onobrychis viciifolia Scop.), or cicer-milkvetch (Astragalus cicer L.) harvested once in August or September. A field study was conducted over a 7-yr period from 1998 to 2004 near Swift Current (lat. 50 degrees 25'N, long. 107 degrees 44'W, 824 m elev.), SK, Canada, using a randomized complete block design. Forage DM yield was similar between August and September harvests (P > 0.05). Binary mixtures of alfalfa - grass produced highest (P<0.05) DM yield ranging from 2449 to 2758 kg ha(-1). The monoculture of crested wheatgrass (2143 kg ha(-1)), sainfoin with crested wheatgrass (2061 kg ha(-1)), and cicer-milkvetch with green needle grass (1838 kg ha(-1)) or cicer-milkvetch with western wheatgrass (1861 kg ha(-1)) produced the second highest (P<0.05) DM yields in the ranking. The two warm-season grasses produced the lowest (P > 0.05) DM yields over the 7-yr period. Monocultures of green needle grass or northern wheatgrass had the highest acid detergent fiber (ADF) and neutral detergent fiber (NDF), while warm-season grasses with legumes had the lowest. Alfalfa with western wheatgrass and alfalfa with Russian wildrye had the highest crude protein (CP) concentrations. Monocultures of meadow bromegrass, crested wheatgrass, green needle grass, or cicer-milkvetch with meadow bromegrass, and sainfoin with crested wheatgrass had the lowest CP concentrations. In vitro organic matter digestibility (IVOMD) was greater for mixtures than for the grass monocultures. Concentration of Ca and P was greater for warm-season grasses than cool-season grasses. Alfalfa with western wheatgrass was the best combination considering yield, quality, and compatibility for deferred grazing in late summer and fall in the semiarid prairies. Tested warm-season grasses are not recommended for seeding as binary mixtures with legumes for southwestern Saskatchewan.
机译：在夏季和秋季，饲料的质量和数量对于加拿大西部的动物进行放牧的体重增加是重要的。本研究的目的是评估饲料营养价值，干物质（DM）产量和冠状小麦草（Artopyron Cristatum（L.）Gaertn的兼容性，草地Bromegrass（Bromus Riparius Rehm。），绿针草[Nasella Viridula （Trin。）Barkworth]，Northern Wheatgrass [Elymus lanceolatus（＆JG SM。）Gould]，西风[Pascopyrum Smithii（Rydb。）Barkworth＆Dr杜威]，俄罗斯野生店[Psathyrostachys Juncea（Fisch。）Nevski]，Big Bluestem（Andropogon Gerardii Vitman），或八个草单一栽培中的Switchgrass（Panicum Virgatum L.），以及苜蓿（Medicago Sativa L.），Sainfoin的二元混合物（Onobrychis Viciifolia Scop。），或Cicer-Milkvetch（Astragalus Cicer L.）在8月或9月收获一次。田间研究是在1998年至2004年的7年期间进行的，附近迅速电流（LAT。50度25'n，长。107度44'W，824米，824米，加拿大，使用随机完整的块设计。饲料DM产量在8月至9月收获之间相似（P> 0.05）。苜蓿 - 草的二元混合物最高（P <0.05）DM产量，范围为2449至2758 kg ha（-1）。有顶饰小麦草（2143千克（-1）），含有顶饰小麦草（2061公斤HA（-1））的Sainfoin，用绿针草（1838千克（-1））或Cicer-Milkvetch随着西麦草（1861千克HA（-1））在排名中产生第二高（P <0.05）℃。两个暖季草在7年期间产生最低（P> 0.05）的产量。绿色针草或北部麦金草的单一栽培具有最高的酸性洗涤剂纤维（ADF）和中性洗涤剂纤维（NDF），而植物的暖气季草具有最低。苜蓿与西风草和苜蓿用俄罗斯野生店的粗蛋白（Cp）浓度最高。用草地狂热的草地狂热，凤头小麦草，绿针草或Cicer-ildvetch，以及带有冠毛般的小麦草的Sainfoin具有最低的Cp浓度。体外有机物消化率（IVomd）对于混合物比草单一栽培更大。对于暖季草而言，Ca和P的浓度比凉爽的季节草更大。苜蓿与西方小麦草是考虑产量，质量和兼容性的最佳组合，以便在夏季深处延期放牧并落在半干旱大草原上。测试的暖季草不建议将播种为萨斯喀彻温省西南部的豆类的二元混合物。

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