Effect of Pennisetum purpureum Schum cv. Guiminyin on Growth Performance of Geese

To explore the feeding value of Pennisetum purpureum Schum cv. Guiminyin in production of geese, effects of feeding the green fodder on growth performance of geese were studied, while P. purpureum K. Scbumacb x P. typhoideum Rich cv. Reyan No. 4 was used as control. The results showed that P. purpureum Schum cv. Guiminyin had high biomass and good nutritional quality, and geese intake of the forage was greater than that of the control variety. The average daily gain was （51.45 ±3.49）g/goose, which was increased by 13.36% compared with control; feed gain ratio was （4.93 ±0.35）%, and feed consumption was reduced by 19.47% compared with control （P 〈0.05）. Thus, it could be concluded that feeding geese with P. purpureum Schum ev. Guiminyin could obtain good economic benefit.

Effect of Pennisetum purpureum Schum cv. Guiminyin on Milk Yield and Quality of Jersey Cattle at Lactation Stage

The study aimed to research the forage value of Pennisetum purpureum Schum cv.Guiminyin in dairy industry and then provide scientific support for feeding jersey cattle with P.purpureum Schum cv.Guiminyin.Totally 20 jersey cattle at lactation stage were selected and divided into two groups randomly,10 cattle each group.The cattle were fed with P.purpureum Schum cv.Guiminyin and P.purpureum cv.Mott×（P.americanum×P.purureum）cv.Guimu No.1,respectively.The results showed that P.purpureum Schum cv.Guiminyin performed well in both nutritional value and palatability,and received remarkable effects on jersey cattle.The milk yield was 5.4%higher than that of before test,and the average daily milk yield was（11.65±0.07）kg/cattle.Compared with control group,milk fat percentage,lactoprotein content and overall milk-solid content were improved somewhat.Feeding jersey cattle with P.purpureum Schum cv.Guiminyin at lactation stage could increase their milk yield and milk quality.

桂闽引象草对泌乳期娟姗奶牛产奶量及乳品质的影响

为探索桂闽引象草在奶牛业生产中的饲用价值,试验选用泌乳期娟珊奶牛20只,随机分为2组,每组10只,分别饲喂由桂闽引象草及桂牧1号杂交象草组成的日粮组合,试验期90d。结果表明:桂闽引象草营养价值高,适口性好,饲喂娟珊奶牛效果明显,产奶量较试验前提高了5.4%,平均日产奶量为11.65kg/头。乳脂率、乳蛋白以及乳总固体物质均较对照组有所提高。用桂闽引象草饲喂娟姗奶牛可以提高泌乳奶牛的产奶量和乳品质。

桂闽引象草对肉鹅生长性能的影响

为了探索桂闽引象草在肉鹅生产中的饲用价值,本文以合浦狮头鹅为研究对象,以桂闽引象草作为青饲料源,王草作为对照品种,研究了饲喂桂闽引象草对肉鹅生长性能的影响,结果表明:桂闽引象草生物产量高,营养品质好,在同等饲喂条件下,肉鹅采食量大于对照品种,平均日增重达51.45±3.49g/只,较对照增加了13.36%;料重比为4.93±0.35%,比对照组少耗料19.47%(P<0.05)。由此可见,饲喂桂闽引象草能够取得较好的经济效益。

热研4号王草和桂闽引象草的核型分析

采用常规压片法,对热研4号王草(Pennisetum purpureum×P.americanum cv.Reyan No.4)和桂闽引象草(P.purpureumcv.Guiminyin)的染色体数目和核型进行分析,以期为狼尾草属种质资源多样性保护利用和遗传育种研究提供理论依据。结果表明,两者染色体基数均为x=7。其中,热研4号王草为三倍体,有21条染色体,核型公式2n=3x=21=21m(3SAT),染色体相对组成I.R.L=9S+3M1+3M2+6L,3条染色体含有随体;桂闽引象草为四倍体,有28条染色体,核型公式2n=4x=28=18m(2SAT)+10sm(2SAT),染色体相对组成I.R.L=10S+6M1+4M2+8L,4条染色体含有随体。热研4号王草和桂闽引象草核型不对称系数分别为60.15%和62.19%,属于1B型和1C型,其核型都属于比较原始的类型。

优质高产牧草紫色象草的选育

为了比较牧草新品种紫色象草的生产价值和营养价值,以便更好地推广应用,试验采用与热研4号王草、桂闽引象草对比方法,在品种比较试验、区域试验和生产试验中进行产量比较,在营养价值中进行花青素、胡萝卜素含量比较。结果表明:品比试验增减产3.54%~-12.94%,除天等试点减产差异极显著(P<0.01)外,其余不显著(P>0.05);区域试验增减产16.22%~-20.04%,4个试点3年2对照共24个年点中有2个热研4号王草年点增产和3个桂闽引象草年点减产差异极显著(P<0.01),2个热研4号王草年点减产差异显著(P<0.05),其余不显著(P>0.05);生产试验增减产4.04%~-25.99%,除南宁点比2对照减产差异显著(P<0.05)外,其余不显著(P>0.05)。茎秆和叶片花青素[(0.030±0.003)与(0.23±0.124)mg/kg]比热研4号王草和桂闽引象草高172.73%~400%和36.36%~216.9%(P<0.05),其余不显著(P>0.05);叶片胡萝卜素[(0.47±0.03)mg/kg]比热研4号王草和桂闽引象草高461.45%(P<0.01)和46.8%(P<0.05),其余不显著(P>0.05)。说明紫色象草产量与热带4号王草和桂闽引象草差异不大,花青素、胡萝卜素显著提高。

氮磷钾不同施肥配比效应对桂闽引象草生产性能及品质的影响

为探索人工种植管理下桂闽引象草的高产高效施肥模式,以氮、磷、钾肥为试验因子,采用"3414"平衡施肥方法对桂闽引象草的高产施肥模式进行研究。结果表明,桂闽引象草通过合理的氮、磷、钾配比平衡施肥,能够达到较好的生产效果,充分发挥其生产性能,其中以N2P2K3施肥效果最佳,即每公顷施用氮肥300 kg、磷肥150 kg、钾肥200.1 kg,年鲜草产量达262.63(±29.75)t,折合干草产量56.41(±4.03)t,比对照(无肥处理)分别增产118.30%和121.81%;桂闽引象草蛋白质含量为12.15%,比对照增加69.69%,效果显著。

台湾象草平衡施肥试验

通过不同的施肥处理方案研究台湾象草的氮、磷、钾需要量及其最佳配比模式。结果表明,台湾象草通过合理的氮、磷、钾配方平衡施肥,能够达到较好的生产效果及经济效益,其中以N2P1K2效果最佳,即氮肥300 kg/hm2、磷肥49.95 kg/hm2、钾肥200.1 kg/hm2,产量较对照(无肥处理)增幅44.50%,其经济效益达到最高水平。

不同套种模式对桂闽引象草生产性能及品质的影响

为了筛选适宜在贵州省松桃苗族自治县推广的高产优质牧草配套栽培技术,试验采用完全随机区组设计,对桂闽引象草和高羊茅不同套种模式下牧草生产性能和品质进行了测定。结果表明,桂闽引象草套种2行高羊茅总鲜草产量达14666.53 kg/667 m^2,经济效益为5866.61元/667 m^2,每667 m^2收益分别比高羊茅单播、套种1行、套种3行高3926.48、182.07、601.31元/667m^2。综上所述,桂闽引象草套种2行高羊茅的栽培模式既可大幅增加土地单位面积牧草产量,又能满足3—9月松桃地区青饲料和早春饲料的供应,且牧草营养品质高,经济效益显著,可在该地区推广利用。