共查询到19条相似文献，搜索用时 203 毫秒
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耐密植饲用玉米杂交种饲用价值的变异Ｌ．Ｐｉｎｔｅｒ等在过去５０年间玉米的种植密度是增加籽粒产量的一个重要因素。籽粒产量对种植密度的反应也是很清楚的，并已用于某些育种计划。Ｍｅｇｈｙｉ等（１９８４）证实针对种植密度的反应进行育种是有价值的。就产量而言，... 相似文献
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为了筛选适于我国南方栽培的饲用红麻品种,在闽南地区对8个饲用红麻品种进行产量、品质、适口性等方面研究。结果表明,供试饲用红麻品种1号和6号综合表现较好,其鲜茎叶产量分别达25.4t/hm2和23.6t/hm2;粗蛋白含量分别达19.42%和22.84%;鲜茎叶饲喂肉牛适口性一般,青贮后外观品质属中等偏上青贮料,饲喂肉牛适口性好。 相似文献
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The concept is presented of combined cultivation of legumes and sorghum–maize and their use as conserved ruminant feed in tropical regions, with special reference to Cuba. Good yields are obtained during the rainy season through intercropping (alternate rows of either sorghum or maize and soybean). When followed by ensiling, this provides high‐quality ruminant feed for the tropical dry season. Soybean compensates for the low crude protein content of sorghum, whereas sorghum allows good silage quality in combination with legumes. The paper reviews and updates recent studies assessing combined sorghum–soybean cultivation and ensiling as well as determination of their feed value. The high nutritive quality and forage potential when these crops are intercropped demonstrate that silage from these plants can be used successfully in ruminant diets in Cuba and other tropical areas. Perspectives for new studies in this field are suggested, particularly with legume species that are more adapted to specific tropical regions and/or with higher forage yield. In addition, it is suggested that there is a need to assess the supplementation impact on meat and milk production at the farm level, as well as its environmental impact, when ruminants are fed combined silages from whole plants of sorghum–legumes. 相似文献
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A.C. RocateliR.L. Raper K.S. BalkcomF.J. Arriaga D.I. Bransby 《Industrial Crops and Products》2012,36(1):589-598
Renewable energy sources are necessary to reduce the U.S. dependence on foreign oil. Sorghum (Sorghum bicolor L.) may be a reasonable alternative as an energy crop in the southern U.S. because it could easily fit into existing production systems, it is drought resistant, and it has large biomass production potential. An experiment was conducted to evaluate several types of sorghum as bioenergy crops in Alabama: grain sorghum - NK300 (GS), forage sorghum - SS 506 (FS), and photoperiod sensitive forage sorghum - 1990 (PS). These sorghum crops were compared to forage corn (Zea mays L.) - Pioneer 31G65 in 2008 and 2009 with and without irrigation, and under conventional (total disked area, 0.15 m deep) and conservation tillage (in-row subsoiling, 0.30 m deep) in a strip-split-plot design. The parameters evaluated were: plant population (PP), plant height (PH), sorghum/corn aboveground dry matter (ADM), biomass moisture content (ABMC), and biomass quality (holocellulose, lignin, and ash). Sorghum had greater ADM than corn; however, corn had lower ABMC than sorghum. Lodging was observed in PS and FS, probably due to high plant populations (>370,000 plants ha−1). Irrigation affected ADM positively in both years, but conservation systems improved ADM production only in 2009. Holocellulose, lignin, and ash variation differed significantly among crops but were lower than 8.3%, 2.0% and 1.9%, respectively, for both years and considered minor. Under conditions of this study, PS was considered the best variety for ADM production as it yielded 26.0 and 30.1 Mg ha−1 at 18 and 24 weeks after planting (WAP). 相似文献