玉米青贮与花生秧配比对奶牛瘤胃中花生秧降解特性的影响     

秦雯霄  廉红霞  付彤  高腾云  孙宇  李改英 《动物营养学报》2015,(6)

本试验旨在研究玉米青贮与花生秧配比对奶牛瘤胃中花生秧降解特性的影响。选择4头体重、生理状态、生产性能相近,装有永久瘤胃瘘管的中国荷斯坦奶牛,分别饲喂含有玉米青贮与花生秧不同配比的全混合日粮(TMR),3种TMR中玉米青贮与花生秧的干物质(DM)配比分别为3.9∶1.0(A组)、1.2∶1.0(B组)、0.4∶1.0(C组)。试验分3期进行,依次进行A、B、C组试验。每期预试15 d,采样期4 d;共57 d。采用尼龙袋瘤胃降解技术测定花生秧在奶牛瘤胃中DM、粗蛋白质(CP)、中性洗涤纤维(NDF)和酸性洗涤纤维(ADF)的72 h瘤胃降解率,并求得目标养分的动态降解参数及有效降解率。结果表明:1)花生秧的DM在瘤胃中有效降解率为56.49%~59.62%,CP为40.45%~47.36%,NDF为33.26%~35.20%,ADF为36.31%~37.45%。2)B组DM的有效降解率显著高于C组(P0.05),极显著高于A组(P0.01);B、C组的CP有效降解率显著高于A组(P0.05)。3)B、C组的NDF快速降解部分含量显著高于A组(P0.05);3种TMR对花生秧粗NDF和ADF有效降解率无显著影响(P0.05)。由此可见,花生秧具有较高的饲用价值。本试验条件下,玉米青贮与花生秧DM配比为1.2∶1.0时,可有效提高花生秧DM和CP的瘤胃降解率。  相似文献   

当前广西柑橘无病苗木生产和推广工作中应当重视的几个问题     

莫健生  刘升球  邓光宙  陈传武  付慧敏 《广西园艺》2007,18(5):11-14

在2005年12月由广西区农业厅和桂林市人民政府联合举办的“全区成功防治柑桔黄龙病交流培训会”的推动下，全区各地都将柑桔无病苗木生产提到了政府议事日程上，一些主产区已建起了自己的无病苗圃，开始柑桔无病苗木的生产。2006年国家农业部下达“广西桂林市柑桔无病良种繁育基地”项目由广西柑桔研究所承担。  相似文献   

三个以色列水果黄瓜品比试验初报     

张兴无  李向林  高安辉  黄静 《广西园艺》2007,18(5):26-27

引进以色列黄瓜新星(NOVA)、伯金(BERGKAMP)和萨娜(SANA)三个水果黄瓜品种在罗甸进行栽培比较试验,结果表明新星(NOVA)单瓜最重,产量最高,抗性最强,适合在贵州南亚热带栽培.  相似文献   

蔬菜生产在土壤重金属污染治理中的作用   总被引：3，自引：0，他引：3  

朱勇  江潇潇  许秀琴  叶宇飞 《长江蔬菜》2007,(10):31-33

由于人们对工业高度发达的负面影响预料不够,预防不利,导致污染事件时有发生.但污水、黑烟、臭气都能被人能直接的感觉到,而土壤污染是看不见的一种污染,它往往不能给人以直接的感受,而是通过其他途径来表现,如粮食减产、绝收,蔬菜产量品质下降.  相似文献   

昆虫性信息素群集诱杀技术对斜纹夜蛾的控害研究   总被引：2，自引：0，他引：2  

覃保荣  黄庆文  陈丽丽  陈斌艳  何燕  黎美坤 《广西植保》2007,20(3):4-7

试验结果表明,与常规防治相比,昆虫性信息素群集诱杀技术具有安全、环保、长效的控害作用,防治效果与成本均优于常规防治;不同放置密度、高度对斜纹夜蛾诱杀效果有差异,高密度区诱蛾量及对减少田间落卵量、压低田间虫源等作用方面表现较好,但成本相对较高,诱捕器悬挂高度以距离地面80~100cm诱蛾效果较好,挂放10d内及发蛾高峰期诱蛾效果明显。  相似文献   

6类9种杀虫剂对稻飞虱的田间效果综合评价     

彭超美  孙光忠  姜干明  董兰  许凌风 《湖北植保》2007,(5):27-29

水稻稻飞虱是我国和许多亚洲国家当前水稻生产中最主要的害虫,也是湖北省水稻生产上的主要迁飞性害虫之一。近几年来我省连续特大发生。特别是2006年。为了明确防治稻飞虱当家农药品种和不同剂型的田间实际防治效果,选择高效、环保、低毒和安全的农药品种推广应用,我们于2006年  相似文献   

籼爪交中稻新组合特优671的选育与应用   总被引：3，自引：1，他引：2  

陈若平  黄华康  杨卓飞  刘兆平  陈华  尤光熙  陈芦根 《福建稻麦科技》2007,25(3):1-3

利用籼爪杂交育种技术育成亚恢671,与龙特甫A配组育成亚种间杂交中稻新组合特优671,具有高产、稳产、适应广等特点,2004年通过福建省农作物品种审定委员会审定。  相似文献   

A system for model-based biomass estimation of larvae in intensive cod larvicultures     

Morten?O.?AlverEmail author  Jo?A.?Alfredsen  Gunvor??ie 《Aquaculture International》2005,13(6):519-541

High and unpredictable mortality rates are observed in the larval rearing of cod (Gadus morhua). As a means of addressing this problem, we present a model-based estimator system which can be used to indirectly measure the larval density through monitoring the live food dynamics and larval growth. The estimator has been evaluated in a conceptual context using a preliminary model formulation, and the observability of the process has been investigated. It was found that the two parameters, live food dynamics and larval growth, contain enough information for the larval density to be estimated under noisy conditions, given the correct model. When the system is applied practically, the estimation error will depend on the measurement and model accuracy; this is especially true with respect to the predictability of the feed intake rate of the fish.  相似文献   

Acute Toxicity of Synthetic Pyrethroid Cypermethrin on the Common Carp (<Emphasis Type="Italic">Cyprinus carpio</Emphasis> L.) Embryos and Larvae     

Rahmi?Ayd?nEmail author  Kenan?K?prücü  Mustafa?D?rücü  Sibel??im?ek?K?prücü  Murat?Pala 《Aquaculture International》2005,13(5):451-458

In this study, the toxic effects on the embryos and larvae of the common carp were used as a model to investigate the synthetic pyrethroid pesticide, cypermethrin, which contaminates aquatic ecosystems. Data obtained from the cypermethrin acute toxicity tests were evaluated using the Probit Analysis Statistical Method. The control and eight test experiments were repeated five times. The number of dead embryos significantly increased in response to cypermethrin concentrations 0.0001, 0.001, 0.01, 0.1, 1, 2, 4 and 8 μg l⁻¹ (p<0.05 for each case). The 48 h LC₅₀ value (with 95% confidence limits) of cypermethrin for common carp embryos was estimated at 0.909 (0.256–5.074) μg l⁻¹. Dose–response decreases in hatching success were recorded as 87.4, 85.0, 80.2, 71.4, 56.3, 48.6, 38.8 and 23.5%, respectively. The lowest concentration of cypermethrin (0.0001 μg l⁻¹) produced a significant increase in the number of dead larvae compared to the control group (p<0.05). The number of dead larvae significantly increased with increasing cypermethrin concentrations exposed for 1–96 h (p<0.05). The highest concentration (8 μg l⁻¹) showed the highest larvae mortality. The 96 h LC₅₀ value (with 95% confidence limits) of cypermethrin for common carp larvae was estimated at 0.809 (0.530–1.308) μg l⁻¹. The results of the study suggest that low levels of cypermethrin in the aquatic environment may have a significant effect on the reproduction and development of carp.  相似文献   

Response of a Juvenile Cyprinid,Lake Minnow <Emphasis Type="Italic">Eupallasella perenurus</Emphasis> (Pallas), to Different Diets     

Rafa??KamińskiEmail author  Micha??Korwin-Kossakowski  Jan?Kusznierz  Leszek?Myszkowski  L. Andrzej?Stanny  Jacek?Wolnicki 《Aquaculture International》2005,13(5):479-486

Three commercial starters (Carp Starter, Uni Starter and Perla Plus) and one non-commercial, with frozen Chironomidae larvae as a reference diet, were evaluated for the intensive rearing of juvenile lake minnow Eupallasella perenurus, a cyprinid fish that is critically endangered in Poland. The growth, condition, survival, body deformities, and chemical body composition were studied. The 90-day laboratory experiment was performed at 22 °C with fish that were initially 24.6 mm (mean total lenth (TL)) and 0.11 g (mean body weight (BW)). Satisfactory fish growth was attained with all of the diets; however, the largest (p ≤ 0.05) final size (48.5 mm TL, 1.55 g BW) and the lowest condition coefficient (K = 1.34) were noted in fish fed the non-commercial starter. The final survival rates were very high (97.5–100%). Skeletal deformities (in 74 to 92% fish) were recorded exclusively in fish fed commercial starters. All commercial starters resulted in considerably higher lipid content and lower ash content than did the non-commercial starter and the reference diet. This suggests that both these factors might be responsible for body deformities. The present results proved that only the non-commercial starter is suitable for juvenile E. perenurus rearing under controlled condition, and that none of the commercial starters can be recommended.  相似文献