共查询到19条相似文献，搜索用时 171 毫秒
1.
根据纤维性状进行选择有可能在保持植物的生物量的同时，改善牧草的可消化性。本文旨在评价对蒂莫西（猫尾草）纤维性状进行不同表型选择后对蒂莫西可消化性、植株生物量、纤维组成含量及其比例的影响，找到在对蒂莫西的生物量没有影响的情况下对其纤维可消化性具有稳定有效的效果的选择标准。将具有高值和低值中性洗涤纤维（NDF）、 相似文献
2.
谷子在我国农牧结合区和牧区正在发展成为专用饲草作物,但对谷子饲草的生长发育和营养变化动态缺乏研究,对最佳刈割期不了解,影响了谷子饲草生产和产业发展。本研究以饲草谷子1号为材料,研究了饲草谷子株高、粗蛋白、粗脂肪、粗纤维、中性洗涤纤维和酸性洗涤纤维等生长和变化动态,结果表明:从拔节至开花后一周的灌浆初期,是饲草谷子鲜质量和干质量的主要形成期,并在灌浆初期鲜质量和干质量达到最高,分别为33.0 t/hm2和12.80 t/hm2。饲草谷子粗蛋白含量在幼苗期含量最高为干草质量的22%,随发育进程的推进而逐渐减低,到乳熟期干饲草粗蛋白含量降为7.3%;饲草谷子粗脂肪的含量随生育期的进程表现了前期含量低,中期含量高,后期含量再降低的动态趋势。单位面积谷子饲草的粗蛋白和粗脂肪产量均在开花后1周的灌浆初期达到最高,以后开始迅速降低。粗纤维、中性洗涤纤维和酸性洗涤纤维也在开花后的灌浆初期达到最大产量。综合本研究的结果,开花后7 d左右是饲草谷子的最佳刈割期,结合生产中的实际情况,从开始开花至群体开花结束的灌浆初期是饲草谷子的适宜刈割期。 相似文献
3.
为研究酶和乳酸菌对多年生黑麦草(Lolium perenne L.)与玉米(Zea mays L.)秸秆混合青贮发酵品质的影响,试验设4个处理,分别为对照(C)、酶制剂(E)、乳酸菌制剂(LAB)、酶+乳酸菌制剂(E+LAB),60天后测定青贮饲料发酵品质。结果表明:添加酶或乳酸菌制剂均提高了多年生黑麦草与玉米秸秆混合青贮饲料的发酵品质。添加剂组p H、丙酸和丁酸含量显著降低(P0.05),氨态氮/总氮值低于(P0.05)或显著低于(P0.05)对照组,乳酸、粗蛋白和水溶性碳水化合物含量增加;E和E+LAB组的中性洗涤纤维和酸性洗涤纤维含量均低于其他各组,而LAB组的中性洗涤纤维和酸性洗涤纤维含量与对照组无显著差异。V-Score评分结果表明LAB处理组青贮发酵品质分数最高。因此,在多年生黑麦草与玉米秸秆混合青贮实际生产过程中,单独使用乳酸菌即可达到理想的效果。 相似文献
4.
为了研究不同施肥处理对谷稗的生物量及品质的影响,以‘朝牧一号'稗子为试验材料,设置4种施肥方式（A有机肥、B有机肥+无机肥、C无机肥、D不施肥）。收集样品后,用烘干恒重的方法测得谷稗生物量的数据。结果表明,处理C的生物量为871 g/m2,比A、B和D处理分别增加了27.2%、11.9%、56.6%;处理C的粗蛋白含量为10.38%,分别比处理A、B和D增加了19.8%、2.9%、13.2%;B处理的谷稗粗脂肪含量为1.29%,比D处理减少了60.3%;D处理的谷稗酸性洗涤纤维(ADF)和中性洗涤纤维(NDF)最低,分别为35.11%和66.11%。在4种施肥方式中,以有机肥+无机肥处理的综合表现较好。本研究结果为东北黑土区高产优质谷稗栽培技术的制定奠定了理论基础。 相似文献
5.
稻草拉伸膜裹包青贮效果分析 总被引：1，自引：0，他引：1
对稻草拉伸膜裹包青贮后进行体外模拟瘤胃环境技术化验分析,结果表明,干物质含量为40.6%、粗蛋白含8.7%、粗脂肪含1.0%、活性纤维含28.7%、总碳水化合物含833.5g/kgDM(干物质)、中性洗涤纤维含58.0%、酸性洗涤纤维含30.5%、粗含灰分5.6%、pH值5.13,与普通稻草相比,粗蛋白含量提高了46%、中性洗涤纤维含量下降了20%、酸性洗涤纤维含量下降了38%、灰分含量下降了56%,说明稻草青贮后提高了营养价值和饲料品质,它的成功应用为稻草青贮饲料的规模化、专业化生产和产业化、商品化经营提供了一条新途径。 相似文献
6.
以绿狐尾藻作为研究材料,探讨添加Lactococcus lactis (LL),Lactobacillus plantarum (LP)和复合菌剂(FH)对绿狐尾藻青贮品质的影响。试验设4 个处理组,即对照组(CK)、actococcus lactis 菌剂组(LL)、Lactobacillus plantarum 菌剂组(LP)、Lactococcus lactis 和Lactobacillus plantarum 复合菌剂组(FH);在青贮第1、3、7、15、30 天取样,实验室分析干物质含量、pH值、粗蛋白含量、中性洗涤纤维、酸性洗涤纤维及有机酸含量。研究结果表明：与对照相比,LL菌剂组可以显著降低绿狐尾藻青贮的pH值(P<0.05),提高乳酸含量(P<0.05),较对照组增加了131.2%;中性洗涤纤维含量显著低于对照组(P<0.05),与对照组相比降低了17.23%;酸性洗涤纤维的含量相比对照组显著降低(P<0.05),比对照组降低了24.56%。FH菌剂组的粗蛋白含量显著高于对照组(P<0.05),较对照组高出12.6%。综上所述,乳酸菌菌剂可以改善绿狐尾藻的青贮品质、营养价值以及消化利用率,为绿狐尾藻的资源化利用提供了数据基础支撑。 相似文献
7.
为筛选适合宁夏引黄灌区种植的优质燕麦品种和丰富该地区牧草资源,选取11个国内外燕麦(Avena sativa)品种在宁夏平吉堡地区种植,对其生产性能及营养品质进行综合评价,结果表明:11个燕麦品种在该地区长势均良好,平均生育期为90d左右。各燕麦品种干草产量及茎叶比表现不同,甜燕1号与当地燕麦产草量较高,而牧乐思茎叶比最小,适口性最好。不同燕麦品种的粗蛋白、粗脂肪、钙、磷、酸性洗涤纤维、中性洗涤纤维含量等差异均显著(P0.05),甜燕1号粗蛋白与粗脂肪含量最高,钙含量最高的为小马,磷含量最高的是贝勒,牧乐思酸性洗涤纤维和中性洗涤纤维含量均最低。对11个燕麦品种的13个性状进行灰色关联度综合分析,结果表明牧乐思、甜燕1号生产性能和营养品质表现最优,可作为宁夏引黄灌区燕麦品种选育和推广应用的优质资源。 相似文献
8.
在海拔4 300m的西藏河谷农区,进行了N、P配合施肥对混播燕麦与箭筈豌豆产量及品质影响的研究。结果表明：刈割期为燕麦乳熟期/箭筈豌豆结荚期,混合饲草产量最高,饲草粗蛋白、粗脂肪含量较高,而酸性洗涤纤维（ADF）与中性洗涤纤维（NDF）较低。N、P及其互作对混播燕麦与箭筈豌豆株高、产量、养分含量的影响显著;在相同施P水平下,随着N的增加,干草产量、株高和粗蛋白呈现先增后减的变化趋势;粗脂肪、ADF和NDF含量随氮肥施用量的增加有不同程度的降低;在相同施N水平下,随磷肥施用量的增加,粗蛋白、粗脂肪、ADF呈增加的趋势,而NDF逐渐降低。施用氮（纯N）140kg/hm 2、磷（P2O5）60kg/hm 2处理组合干草产量最高为16 636kg/hm 2,比不施肥对照组增产60.47%;蛋白质含量最高达18.42%。说明N、P施用量分别为140kg/hm 2、60kg/hm 2可作为该地区燕麦与箭筈豌豆混播种植的推荐施肥量。 相似文献
9.
基于熵值赋权的DTOPSIS法对鲁南地区11个饲用燕麦品种的综合评价研究 总被引：1，自引：0，他引：1
为筛选适宜在鲁南地区种植的饲用燕麦品种及探讨燕麦新品种综合评价的方法,利用基于熵值赋权的DTOPSIS法对11个燕麦品种的株高、鲜草产量、干草产量、茎叶比、粗蛋白含量、中性洗涤纤维含量、酸性洗涤纤维含量和相对饲草品质等方面进行综合分析。结果表明,熵值赋权法客观评价了各指标在该评价体系中的重要程度,指标中权重最大的是茎叶比,其余依次是鲜草产量、粗脂肪含量、相对饲草品质、干草产量、粗蛋白含量、株高、中性洗涤纤维含量、粗灰分含量和酸性洗涤纤维含量,符合对燕麦饲料的要求。Ci值排名前5的品种是燕王、牧王、魄力、贝勒和甜燕麦。这5个品种产量较高,综合性状表现优良,适宜在鲁南地区推广种植。 相似文献
10.
1品种来源与选育经过晋农科1号(原并单12号)是山西省农科院作物遗传研究所用自选自交系203-279作母本,自选系203-204作父本杂交选育的高产高消化性青贮玉米单交种。经过2003年本所鉴定试验、2004年品种比较试验和2005~2006年山西省青贮玉米区域试验,表现子粒产量和生物鲜重高,全株蛋白质含量高,抗病性和叶片保绿性强,酸性洗涤纤维含量和中性洗涤纤维含量等消化性指标都优于对照。2007年1月通过山西省品种审定委员会审定,准予推广。母本自交系是用温带高配合力材料18599和日本高消化材料QY67以及墨西哥热带保绿性好的材料MXG-14等3个种质经杂交、回交和6代自交选育而成。…… 相似文献
11.
牧草叶作为饲料原料的营养价值分析 总被引：1，自引：0，他引：1
[目的]研究旨在测定5种牧草叶片的主要营养成分,分析、评价其氨基酸的营养价值,以期为牧草叶型饲料的开发利用提供科学依据。[方法]各样品的粗蛋白、氨基酸、粗脂肪、钙、磷含量采用常规方法测定,中性洗涤纤维和酸性洗涤纤维含量采用滤袋法测定;采用必需氨基酸的氨基酸评分及化学评分评价各样品氨基酸营养价值。[结果]结果表明：(1)5种牧草叶片中CP、Ca、NDF和ADF含量的差异较大,其中CP、Ca、NDF含量差异均达到显著水平(P＜0.05);水葫芦CP含量最高;2种豆科牧草叶片的CP含量显著高于禾本科牧草叶片,ADF含量则显著低于禾本科牧草叶片。(2)5种牧草叶片氨基酸种类齐全,总氨基酸、必需氨基酸含量丰富;蛋氨酸是5种牧草叶片的共同第一限制性氨基酸。[结论](1)水葫芦、紫花苜蓿、葛藤叶片的CP含量较高,可以作为蛋白饲料原料开发利用。(2)多花黑麦草和杂交狼尾草叶可以作为优质粗饲料进行开发利用。(3)利用5种牧草叶片配制牧草叶型畜禽全价饲料应适当添加蛋氨酸或补充富含蛋氨酸的原料。 相似文献
12.
Evaluation of plant species for animal feed requires the quantitative and qualitative comparison of different genotypes. Promising lines of annual legumes comprising seven genotypes of vetche ( Vicia spp.) and chicklings ( Lathyrus spp.) were compared for herbage quality. The content of crude protein (CP), neutral detergent fiber (NDF) and acid detergent fiber (ADF) in herbage and pods were measured at different stages of plant maturity. The proportion of the leaves to shoots (leafiness) and in vitro dry matter digestibility (IVDMD) were also determined. As plants matured IVDMD, CP and leafiness decreased and NDF and ADF increased. For all the genotypes maximum digestible dry matter (DDM) and CP yields were more or less attained at 50–100 % podding. Narbon vetch had the highest DDM. The possible uses of the different genotypes as animal feed are discussed based on the partitioning of the DDM and CP yield as plants matured. 相似文献
13.
Newfoundland's climate is marginal for agricultural production. The availability of locally grown cereal grain and high‐quality forage are major limitations to successful animal agriculture in this region. Here, our overall objective was to compare several spring cereal species for both annual forage and grain production in Newfoundland's cool Maritime climate. Several varieties of barley (Hordeum vulgare L.), wheat (Triticum aesitivum L.), oats (Avena sativa L.) and pea (Pisum sativum L.)–cereal mixtures for forage yield and quality, as well as grain yield and maturity, were compared in field trials on the east and west coasts in both 1999 and 2000. Barley headed earliest, yielded greatest forage dry matter, had lowest forage protein and acid detergent fibre (ADF) percentages, and had neutral detergent fibre (NDF) mean values greater than those of pea–cereal mixtures, but less than those of oats and wheat. Forage harvested from pea–cereal mixtures was similar to that of barley for yield, ADF and NDF, while P and protein percentage were much greater. Barley matured 10–15 days earlier than both wheat and oats. In general terms, all three spring cereals exhibited similar grain yield potential. Oats tillered less, but compensated by producing more kernels spike?1. Days to maturity for cereal grains in western Newfoundland were roughly similar to those reported for the Maritime provinces of Canada. Yield and maturity results for both forage and grain production suggest that eastern Newfoundland is a unique agro‐ecoregion in North America, and agronomic recommendations specific to other regions may not be applicable in this region. 相似文献
14.
东乡野生稻与普通栽培稻中性洗涤纤维、酸性洗涤纤维等含量的对比研究 总被引：1，自引：0，他引：1
为研究不同种类、不同生育时期水稻植株细胞壁化学组分变化规律,应用Van Soest法对普通栽培稻与东乡野生稻在不同生育时期的植株NDF、ADF等含量进行了研究。结果表明,NDF、ADF、ADL含量（％）的平均值变化范围分别是55.63～71.70、31.98～49.61、2.68～5.71,其中以蜡熟期的东野各含量为最高,以抽穗期的协青早B各含量最低。在同一生育时期,不同种类水稻的NDF、ADF含量（除抽穗期的NDF）有显著性差异（P<0.05）,以东野的含量为最高,秀水110其次,以协青早B含量为最低。在同一种类水稻中,不同生育时期的水稻NDF、ADF含量差异均达到显著性水平（P<0.05）,以抽穗期的含量为最低,乳熟期其次,至蜡熟期含量达到最高峰。 相似文献
15.
我国常用玉米自交系秸秆品质性状及其相关分析 总被引：11，自引：0，他引：11
利用近红外反射光谱法对我国91份常用普通玉米自交系和11份高油自交系秸秆的体外干物质消化率（IVDMD）、粗蛋白（CP）、粗脂肪（EE）、可溶性糖（WSC）、酸性洗涤纤维（ADF）、酸性木质素（ADL）、中性洗涤纤维（NDF）7个品质性状进行了分析评价,以探讨秸秆品质性状间的关系以及影响秸秆品质的主要成分。结果表明,各品质性状变异较大,各性状自交系间差异均达极显著水平,IVDMD及其相关品质的含量近似正态分布。不同品质性状变异程度不同,其中WSC含量变异最大,变异系数达33.15%。IVDMD与NDF、ADF、ADL呈极显著负相关,与WSC、EE含量呈极显著正相关,与CP含量显著正相关。影响秸秆品质的性状依次是IVDMD、ADF、NDF、WSC、ADL、CP和EE含量。根据青贮玉米育种的要求,筛选出5份IVDMD和WSC含量高、NDF、ADF含量低的自交系。 相似文献
16.
Higher ruminant intake potential and in vivo digestibility as indicated by lower neutral and acid detergent fibre (NDF and ADF), respectively, and higher crude protein (CP), may be valuable targets in tall fescue breeding. Some 105 full‐sib families from a diallel cross of Mediterranean parent germplasm were grown in a heated greenhouse simulating the temperature pattern of a Mediterranean environment, to estimate genetic parameters for NDF, ADF, CP and dry matter (DM) yield in one autumn and one winter harvest. Family x harvest interaction was large for NDF and ADF, moderate for CP and absent for DM yield. Additive genetic variance was mostly larger than specific genetic variance, and tended to be small for quality traits and large for DM yield. Narrow‐sense heritability was low for CP and ADF in autumn and moderate to fairly high in the remaining cases. Predicted gains per selection cycle never exceeded 5% for quality traits while being greater than 10% for DM yield. An inverse genetic correlation between DM yield and any quality trait emerged in the presence of sizeable genetic variation. 相似文献
17.
The objective of this study was to determine the chemical composition and in vitro dry matter (IVDMD) and neutral detergent fibre (IVNDFD) digestibilities of silages made from whole‐crop pea [Pisum sativum L. (PS)], pea–wheat [Triticum aestivum L. (PW)], pea–barley [Hordeum vulgare L. (PB)] and pea–oat [Avena sativa L. (PO)] mixtures harvested 8 weeks (H8) and 10 weeks (H10) after seeding. Forty‐five days after ensiling, all forages were well ensiled as indicated by low pH and low water‐soluble carbohydrate content and high lactic acid concentration. Regardless of forage type, crude protein (CP) and IVNDFD were higher while starch and acid detergent lignin were lower in H8 than H10. However, harvest date had no effect on neutral (NDF) and acid (ADF) detergent fibre of the silages. Within each harvest date, CP was higher while NDF was lower for PS than pea–cereal silages. Differences in CP and fibre fractions between the pea–cereal mixture silages were not consistent for the two harvest dates. The IVDMD of PS was higher than that of the three pea–cereal mixture silages in H8 but was only higher than that of PB in H10. For the pea–cereal mixtures, IVDMD was higher for PO than PB and PW in H8 and was higher for PB than PW in H10. It was concluded that silage from pea monoculture had similar forage yields and a generally higher nutritive value than silages from pea–cereal mixtures. 相似文献
18.
I. Andrighetto P. Berzaghi G. Cozzi F. Gottardo M. Zancan 《Journal of Agronomy and Crop Science》1997,179(4):251-256
Spring cut Italian ryegrass was harvested at two different stages of maturity: lake vegetative (EARLY) and flowering (LATE). The wilted forage was round baled and then ensiled by wrapping in plastic film. EARLY harvest reduced dry matter (DM) yield significantly as compared to LATE (5.6 vs. 10.5 t ha−1 ; P < 0.01). However, forage quality both before and after ensiling was better for EARLY with higher crude protein (CP) and non-structural carbohydrates content and a lower amount of cell walls (NDF). Higher pH and the fermentation characteristics confirmed the poor quality of LATE silage, having higher content of butyrate, propionate and acid detergent insoluble nitrogen and a lower concentration of lactic acid.
Dry matter intake of EARLY silage by sheep (average 65.0 ± 7.3 kg LW) fed solely forage ad libitum was 37 % higher than LATE (1386 vs. 1011 g DM day−1 ; P < 0.05) due to its better palatability and digestibility. In vivo DM digestibility of EARLY silage was 76.1 % while it decreased to 58.2 % for LATE silage. Estimated metabolizable energy content of EARLY silage (11.5 MJ kg−1 DM) was 29 % higher than LATE (8.9 MJ kg−1 DM) resulting as similar to the reference value of a high quality perennial ryegrass silage. The forage conservation system of ensiled round bales is effective and recommended when spring cut Italian ryegrass is harvested at an early stage of maturity. 相似文献
Dry matter intake of EARLY silage by sheep (average 65.0 ± 7.3 kg LW) fed solely forage ad libitum was 37 % higher than LATE (1386 vs. 1011 g DM day
19.
Hui-ling Xie Hong-qiang Ji Zong-hua Liu Guo-wei Tian Chun-li Wang Yan-min Hu Ji-hua Tang 《Euphytica》2009,165(3):485-493
The effect of two different nitrogen treatments on five traits associated with yield and nutrient composition of stover were
evaluated using a set of 213 F2:3 families derived from two elite inbred lines Huang-C and Xu178. Evaluation of the phenotypes expressed under the two nitrogen
conditions showed that low nitrogen conditions could increase acid detergent fiber (ADF) and neutral detergent fiber (NDF),
and decreased crude protein content (CP), crude fat content (CF), and stover yield (SY), thereby negatively affecting the
digestibility and quality of silage maize. Twenty-eight quantitative trait loci (QTL) were identified affecting the five measured
traits under two nitrogen conditions, including four for ADF, five for NDF, five for CP, four for CF, and three for SY. Several
QTL associated with ADF or NDF were detected under same nitrogen conditions, and were localized to the same chromosomal regions,
especially the QTL qADF6 and qNDF6, qADF10 and qNDF10, were only detected under low nitrogen condition. These results suggested that ADF and NDF perhaps were controlled by several
common genes, and that the nutritional content of stover may be influenced by additional genetic mechanisms when grown under
conditions of low nitrogen. 相似文献