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江苏农林学院校园内草坪交播返青状况分析 《畜牧与饲料科学》2015,36(10):58-58
观察江苏农林职业技术学院校园内狗牙根天堂328冬季分别交播一年生黑麦草、多年生黑麦草和鹅冠草入春后返青的状况,多次观察并对比其差异。结果发现,一年生黑麦草交播的狗牙根草坪返青情况最好,其次为交播鹅观草的草坪,交播多年生黑麦草的草坪返青情况最差。 相似文献
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EDTA对一年生黑麦草种子萌发及幼苗生长的影响 总被引:1,自引:0,他引:1
一年生黑麦草(Lolium perenne L.)又称多花黑麦草、意大利黑麦草,其以生长快、丰产性好、饲用价值高享有盛誉。一年生黑麦草在我国江西、湖南、江苏、浙江等长江流域以南地区广为栽培。近些年来,一年生黑麦草在华北、东北、内蒙古等北方一些多雨地区的引种栽培也开始受到重视。 相似文献
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一年生黑麦草又称多花黑麦草、意大利黑麦草,是禾本科黑麦草属一年生或越年生草本植物。草质柔嫩,适口性好,家畜喜食。 相似文献
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针对我国南方地区冬闲田数量多、利用率低的现象,充分利用冬闲田种草养畜,不仅可以解决牲畜季节性青绿粗饲料缺乏问题,还能促进农民增收和农业可持续发展。一年生黑麦草由于适生范围广,鲜草产量高,营养丰富且柔嫩多汁,适口性好,家畜家禽喜欢采食,深受农户青睐,成为一种极具发展前途的越年生优质牧草,近年来在畜牧业生产中得到广泛应用。本文从一年生黑麦草生物性状、营养特性、冬闲田的丰产栽培技术、青贮技术以及在各类畜禽的饲喂研究角度进行综述,并指出今后的研究重点和方向。旨在为一年生黑麦草在畜牧业中的进一步推广应用提供参考。 相似文献
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白三叶和黑麦草品种在成都地区的引种试验 总被引:8,自引:4,他引:4
对引自百绿集团的白三叶4个品种、多花黑麦草2个品种和多年生黑麦草2个品种在成都地区进行引种试验。结果表明:各品种均能适应当地气候条件,其中白三叶Sustain和C6151再生好,产量高,分别为88350kg/hm2和84450kg/hm2;多花黑麦草再生速度快,产量高,青绿期长,营养价值高;均可在四川盆地大面积推广。多年生黑麦草再生慢,产量低,且越夏性能差,可在高原牧区推广。 相似文献
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铝胁迫对多花黑麦草生长和生理的影响 总被引:2,自引:0,他引:2
选取5个多花黑麦草(Lolium multiflorum)品种为受体材料,在水培条件下分析了不同浓度的铝胁迫对5个多花黑麦草品种种子萌发、幼苗生长及生理特性的影响。结果表明:(1)铝胁迫对多花黑麦草种子萌发及幼苗生长的影响表现为"低促高抑"。与对照相比,25mg/L低浓度铝胁迫下多花黑麦草的发芽率、根长、株高、单株鲜重增加;当铝浓度增加为50 mg/L时,多花黑麦草幼苗生长受到抑制;当铝浓度500mg/L时,多花黑麦草种子萌发和幼苗生长受到显著抑制;当铝浓度1 000mg/L时,多花黑麦草幼苗生长受到严重抑制,根系停止生长,株高、单株鲜重显著下降。(2)低浓度铝胁迫下(0~50mg/L),多花黑麦草叶绿素含量、可溶性糖含量、丙二醛、过氧化物酶和超氧化物歧化酶活性变化不大;中等浓度铝胁迫下(100mg/L),多花黑麦草叶绿素含量显著降低,可溶性糖和丙二醛含量显著增加,过氧化物酶和超氧化物歧化酶活性显著增强(P0.05);高浓度铝胁迫下(500mg/L),多花黑麦草叶绿素、可溶性糖和丙二醛含量降低,过氧化物酶和超氧化物歧化酶活性降低。多花黑麦草的铝胁迫阈值为100mg/L。 相似文献
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采用盆栽实验研究了100 mg·kg-1砷(As)胁迫下,一年生黑麦草和多年生黑麦草生长情况以及老叶、功能叶、新叶、茎、根系5个部位As吸收特征及其与茎叶营养元素积累的关系。结果表明,一年生黑麦草As耐性优于多年生黑麦草,株高和根长分别只降低13.3%和3.3%,两种黑麦草5部位干重都呈现降低趋势,但多年生黑麦草老叶和一年生黑麦草根系未达显著水平。两种黑麦草不同部位As分配均表现为根系>老叶>茎>功能叶>幼叶,且多年生黑麦草对As的吸收能力优于一年生黑麦草;茎叶对N、P、K 3种元素的吸收均呈现新叶>功能叶>老叶,对Ca、Mg、Mn 3种元素的吸收则呈现老叶>功能叶>新叶;植物体内As与Mg呈极显著负相关关系,与其他营养元素相关性在两种黑麦草不同部位间表现不同。 相似文献
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对在贵州地区广泛种植的多花黑麦草特高(Lolium multiflorum‘Tetragold’)和多年生黑麦草四季(L.perenne‘Four seasons’)的成熟种子进行了愈伤组织诱导及植株再生的研究,建立了两个品种的胚性愈伤组织高频诱导与再生体系。结果表明,剥去成熟种子的颖壳,切除1/3胚乳端,将特高接种于CC+7mg·L~(-1) 2,4-D+0.5mg·L~(-1) 6-BA、四季接种于CC+5mg·L~(-1) 2,4-D+0.5 mg·L~(-1) 6-BA的培养基中,在明显降低组培污染率的同时,能分别得到65.52%和63.55%的最高愈伤组织诱导率;将两个品种诱导出的愈伤组织转移在MS+0.5 mg·L~(-1) 2,4-D+0.5mg·L~(-1) 6-BA+1.25mg·L~(-1) CuSO4+1.0g·L~(-1) CH的继代培养基上,能促进质量较好的Ⅱ型胚性愈伤组织的形成;根据后续转化试验所选用的植物表达载体pCAMBIA 1300的抗性特点,30~40mg·L~(-1)的潮霉素是两个品种愈伤组织最佳的筛选剂和临界浓度;特高的胚性愈伤组织接种在MS+2.0 mg·L~(-1) 6-BA+0.5 mg·L~(-1) NAA+0.1mg·L~(-1) TDZ的培养基上,可以产生86.37%的最高分化率,四季的胚性愈伤组织接种在MS+6.0 mg·L~(-1) 6-BA+0.3mg·L~(-1) NAA+5.0mg·L~(-1) KT的培养基上,能得到85.40%的最高分化率;生根培养基1/2MS+0.5 mg·L~(-1)NAA+0.5mg·L~(-1) IAA能让两个品种分化出的不定芽形成100%的生根率;以腐殖土∶蛭石∶砂壤土=1∶1∶1的混合材料作为营养土,能保证组培再生苗达到99%以上的成活率。优化建立的高频组培再生体系为下一步的遗传转化奠定了基础。 相似文献
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SUMMARY Most stock losses caused by annual ryegrass toxicity occur because stockowners unknowingly allow their stock to graze annual ryegrass (Lollum rigidum) Infected with the bacterium Clavlbacter toxicus. To help stockowners avoid losses we have developed criteria for a testing service to determine the risk of poisoning before the pasture is grazed. Low, medium and high risk categories were selected using samples of dry, mature ryegrass seedheads collected by stockowners from untreated, Infected pastures In South Australia. The proportion of toxic paddocks in each risk category over all the seasons tested was 11%;, 32%; and 76%;, respectively, and these accounted for 7%;, 14%; and 79%; of total stock losses. The proportion of paddocks in which stock were poisoned did not vary significantly between years, was not affected by variation in sample weight, and did not vary between South Australia and Western Australia. 相似文献
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在中国科学院海北高寒草甸定位站以一年生黑麦草(Lolium perenne)、小黑麦(Triticale hexaploide)、燕麦(Avena sativa)和垂穗披碱草(Elymus nutans)为研究对象,对其产草量、牧草营养品质进行测定,以探讨不同牧草的产量和品质。结果表明:小黑麦干草产量为1345.50 g·m-2,显著高于一年生黑麦草(974.93 g·m-2)、垂穗披碱草(301.75 g·m-2)和燕麦(329.60 g·m-2)。小黑麦产量是垂穗披碱草和燕麦干草产量的4~4.5倍,是黑麦草干草产量的1.4倍。垂穗披碱草粗蛋白(CP)含量显著高于一年生黑麦草和小黑麦(P<0.05),一年生黑麦草粗蛋白(CP)含量最小。单位面积粗蛋白(CP)产量、粗脂肪(EE)产量、中性洗涤纤维(NDF)产量和酸性洗涤纤维(ADF)产量以一年生黑麦草最高,显著高于小黑麦、垂穗披碱草和燕麦(P<0.05)。 相似文献
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《African Journal of Range and Forage Science》2013,30(3):93-101
The seasonality of growth and low nutritional value of kikuyu (Pennisetum clandestinum) pasture restrict milk production. The aim of the study was to determine the dry matter yield, botanical composition and nutritional value of irrigated kikuyu over-sown with annual ryegrass (Lolium multiflorum var. westerwoldicum), white clover (Trifolium repens) and red clover (T. pratense) or a mixture of perennial ryegrass (Lolium perenne) with white and red clovers under intensive grazing conditions with dairy cows. The incorporation of annual ryegrass, perennial clover or perennial ryegrass–clover into kikuyu pasture changed the seasonal fodder flow and increased the spring dry matter (DM) production. The over-sowing of kikuyu with annual ryegrass had no effect on the DM production of kikuyu during the summer and autumn. Kikuyu and kikuyu–ryegrass, fertilised with nitrogen fertiliser, had a higher DM production rate than kikuyu–clover pastures. Kikuyu–ryegrass pasture transformed from ryegrass-dominant in spring to kikuyu-dominant in summer and only kikuyu in autumn. This led to a decrease in metabolisable energy (ME) and increase in neutral detergent fibre (NDF) content of the pasture during spring, summer and autumn as kikuyu became more dominant. The clover content of kikuyu over-sown with clover decreased annually but was still higher than 30% at the end of two years after establishment. As the kikuyu content of the kikuyu–clover pastures increased, the seasonal growth rate changed from a low autumn growth (37.9 kg DM ha?1 d?1) in the first year to a higher autumn growth (48.5 kg DM ha?1 d?1) in the second year. The over-sowing of kikuyu with clover resulted in lower DM production and NDF values and higher crude protein (CP), ME and calcium (Ca) values. The lowest CP content in kikuyu–ryegrass pasture was during summer and autumn when kikuyu was dominant. The Ca content of the grass pastures (kikuyu and kikuyu–ryegrass) was low. The phosphorus (P) content of both the kikuyu–clover and grass pastures exceeded the requirement needed for dairy production (0.38%). The mean Ca:P ratio of the kikuyu–clover pasture meets the 1.6:1 ratio needed by dairy cows. The kikuyu and kikuyu–ryegrass pasture had a Ca:P ratio lower than 1:1 and Ca supplementation would be needed for dairy cows. The incorporation of annual ryegrass, perennial clover or perennial ryegrass–clover into kikuyu pasture improved the seasonal DM production and nutritional value of the pasture. 相似文献