杨树不同无性系根系生长的比较     

吴丽云  令狐荣钢  阚荣飞  王媛媛  江秀莲  陆发利 《防护林科技》2015,(7)

通过对20个杨树无性系的根系生长进行的比较及聚类分析研究,结果表明：20个杨树无性系不定根总长度和数量均具有较大的差异,其中,中驻1号不定根总长度最长,达到35.6 m,其次是 NL351、T26和中驻6号,最小的为109,仅为15.4 m。数量最大的也是中驻1号,共65根;中驻6号、W07和 I107次之;最小的为 W03和109,均为24根。基部直径在2 cm 以下的不定根占不定根总数量的60%~80%;聚类分析将20个杨树无性系分成6类。  相似文献   

H₂O₂溶液对 2种红葡萄离体叶中主要茋化物含量的影响   总被引：1，自引：1，他引：0  

田春芳 张波刘景磊  李荣飞王晓琴 陈韩英 《中国农学通报》2013,29(6):85-90

比较H2O2诱导后美国红提(‘红地球’)和紫香无核(‘新农4号’)离体葡萄叶片中的白藜芦醇(Res)、白藜芦醇苷(PD)、紫檀芪(PS)、ε-二聚体葡萄素(ε-VF)4种芪化物的含量,为利用葡萄生产废弃叶片的综合利用提供依据.采用H2O2溶液对红提和紫香无核离体葡萄叶片进行诱导,采用高效液相色谱法分析4种芪化物的含量变化.H2O2诱导后的两种离体叶片4种芪化物的积累呈现显著的量时依赖性;2.5％H2O2处理48 h后叶片4种芪化物含量可提高6倍以上,以红提的含量相对较高,总芪化物鲜重达到138.82μg/g.用H2O2诱导后的离体葡萄叶中4种芪化物含量比诱导前有了较为明显的增加.  相似文献   

基于水系生态保护的林业调查规划研究     

陆发利  郝亮  阚荣飞  吴丽云  刘莉 《绿色科技》2013,(3):13-16

以水系林业生态保护为目标,采用问题研究与目标导向相结合、规划研究与实施应用相结合的技术路线,全面调查分析了沂蒙山区水系分布状况及林业资源现状,进行了以水系林业生态保护为目的林业生态建设区域和类型划分,开展了重点区位水系林业生态保护专项研究与专项规划设计。  相似文献   

甜菜碱日粮对热应激条件下肉鸭生长性能、血液指标及盲肠脂肪酸含量的影响     

田梅  张蕾  房灿  崔荣飞  杨洁  李玉卡 《中国饲料》2019,(16):68-72

文章旨在评估甜菜碱对热应激条件下肉鸭血液指标、电解质、气体分压和盲肠短链脂肪酸含量的影响。试验选择平均体重为48.6g当天孵化的肉鸭400只,随机分为4组,每组5个重复,每个重复20只。试验日粮处理分为对照组和3个处理组,对照组饲喂基础日粮(自由采食),处理1组为热应激条件下添加1500mg/kg甜菜碱,处理2组为热应激条件下5点~10点以及17点~20点饲喂含1500mg/kg甜菜碱日粮,处理3组为热应激条件下17点~10点饲喂含1500mg/kg甜菜碱日粮,试验共进行42d。结果显示:饲喂甜菜碱日粮的肉鸭较对照组体重显著提高(P<0.05)。对照组肉鸭血液红细胞总数、红细胞压积、血红蛋白、红细胞平均体积、红细胞分布宽度、血小板计数、血小板压积、血小板平均体积均低于甜菜碱组(P<0.05)。不同饲喂时间的甜菜碱组肉鸭电解质浓度均高于对照组(P<0.05)。对照组肉鸭血液二氧化碳分压、氧气分压、细胞外液碱浓度、碳酸氢盐和总二氧化碳浓度均低于甜菜碱组(P<0.05)。与对照组相比,甜菜碱组肉鸭盲肠中总短链脂肪酸、乙酸、丙酸的浓度较高(P<0.05),而丁酸、异丁酸、戊酸和异戊酸含量较低(P<0.05)。因此,与自由采食相比,在上午和下午限制饲喂甜菜碱日粮或17~10点饲喂甜菜碱日粮显著提高了热应激条件下肉鸭的生长性能和生物学参数。  相似文献   

残膜卷拾机的设计与试验     

张帅  闫小丽  杜荣飞  孙丽雯  刘娜 《农机化研究》2022,44(1):112-116,123

针对国内现存残膜回收机回收效率低、含杂率高及卸膜困难等问题,设计了一种适用于玉米窄膜覆膜田作业的残膜卷拾回收机具.整机由起膜装置、膜杂分离装置和卷膜装置组成,一次作业可完成起膜、送膜、膜杂分离、卷膜及卸膜等作业项目.田间试验结果表明:在机具前进速度为2 km/h时,机具残膜拾净率为92％,且作业性能较稳定,满足农业行业...  相似文献   

Influence of Florfenicol on the Treatment Effect of Intermittent Aeration Dynamic Membrane Bioreactors,and its Enhanced Removal Process Investigation     

Xiang Wu  Hao Wu  Lin Mao  Lan Yu  Rongfei Zhang  Jinyun Ye 《Water, air, and soil pollution》2016,227(11):418

  相似文献   

河北省部分猪场送检样品的猪蓝耳病抗体水平分析     

王丽娟  罗尚星  崔荣飞  左玉柱 《中国动物检疫》2018,35(4):5-7

为了解河北省规模猪场猪蓝耳病(PRRS)感染及免疫情况,选取2016—2017年河北省7个地区不同规模猪场送检的1 182份血样进行PRRS EILSA抗体检测,并对结果进行汇总分析。结果显示:7个地区不同规模猪场送检血样的阳性率均在80%以上,尤其是大型规模化猪场,抗体阳性率更高;地区间阳性率差异不大,均在75%~92%之间;散养和断奶仔猪群阳性率相对偏低。结果表明,河北省规模猪场的PRRS免疫效果较好;散养猪群和断奶仔猪群是发生PRRS的高风险猪群。结果提示,规范科学的PRRS免疫程序可以获得较好的免疫效果;应注重对散养和断奶仔猪群的免疫,根据抗体检测情况合理采取免疫措施。  相似文献   

北美红枫等3个彩叶树种生长发育规律观测分析          下载免费PDF全文

郝亮  陆发利  阚荣飞  陈雪  江秀莲  王媛媛 《中国城市林业》2013,11(3):22-24

对临沂市引种的北美红枫、千层金、金叶连翘3种彩叶树种的物候期及生长发育特性进行观测研究,总结分析其在本地区的生长节律,为引种、栽培及应用奠定基础。    相似文献   

沂河沿线林业生态经济景观廊道建设规划初探          下载免费PDF全文

陆发利  郝亮  刘莉  王媛媛  陈雪  江秀莲  阚荣飞 《中国城市林业》2013,11(2):37-39

文章在对沂河沿线乡镇自然经济条件、植被状况、林业生态现状进行调查分析的基础上,提出了生态、经济、景观相结合的生态廊道建设规划。    相似文献   

The effect of the ratio of standardized ileal digestible lysine to metabolizable energy on growth performance, blood metabolites and hormones of lactating sows     

L Xue  X Piao  D Li  P Li  R Zhang  SW Kim  B Dong 《畜牧与生物技术杂志(英文版)》2012,3(1):11-12

ABSTRACT: A total of 335 lactating sows (Landrace × Large White) were used in two experiments to determine the optimum ratio of standardized ileal digestible lysine (SID-Lys) to metabolizable energy (ME) for mixed parity sows during lactation. In Exp. 1, 185 sows (weighing an average of 256.2 ± 6.5 kg and having an average parity of 3.4 ± 0.3) were allocated to one of six experimental diets in a completely randomized block design within parity groups (1, 2, and 3+). The experimental diets were formulated to contain 3.06, 3.16, 3.20, 3.25, 3.30 or 3.40 Mcal/kg of ME and each diet was fed to the sows throughout a 28 day lactation. All diets provided a similar SID-lysine level (0.86%). As a result, the diets provided a SID-Lys:ME ratio of 2.81, 2.72, 2.69, 2.65, 2.61 or 2.53 g/Mcal ME. Sow feed intake was significantly (P < 0.01) affected by the energy content of the diet as well as by sow parity. Using regression analysis, feed intake was shown to be maximized at 3.25, 3.21, 3.21 and 3.21 Mcal/kg of ME for parity 1, 2, 3+ sows and the entire cohort of sows respectively (quadratic; P < 0.01). In addition, the result of feed intake can be expressed as 2.65, 2.69, 2.69 and 2.68 g/Mcal based on analysis of SID-Lys:ME ratio. Litter weight gain was affected by dietary treatment for parity 3+ sows and the entire cohort (P < 0.01). Based on regression analysis, litter weight gain was maximized at 3.25 and 3.24 Mcal/kg of ME for parity 3+ (quadratic; P < 0.01) and the entire cohort (quadratic; P < 0.01). Similarly, the result of litter weight gain could be expressed as 2.65 and 2.66 g/Mcal of SID-Lys:ME ratio. Therefore, 3.25 Mcal/kg of ME was selected for Exp. 2 in which 150 sows (weighing 254.6 ± 7.3 kg and having an average parity of 3.4 ± 0.4) were allocated to one of five treatments in a completely randomized block design within parity (1, 2, and 3+). The experimental diets were formulated to contain 2.1, 2.4, 2.7, 3.0 or 3.3 g/Mcal of SID-Lys:ME ratio with all diets providing 3.25 Mcal/kg of ME. The diets were fed to the sows throughout a 28 day lactation. Sow body weight loss was affected by dietary treatment (parity 3+ sows, P = 0.02; entire cohort, P < 0.01) and by sow parity (P < 0.01). Litter weight at weaning and litter weight gain were affected by dietary treatment for parity 1, 2, 3+ sows and the entire cohort (P < 0.01) as well as by sow parity (P < 0.01). Plasma urea nitrogen (P < 0.01), creatinine (P < 0.01) and non-esterifide fatty acids (P = 0.04) were decreased as the SID-Lys:ME ratio of the diet increased. Insulin-like growth factor-1 (P = 0.02), estradiol (P < 0.01) and luteinizing hormone (P = 0.02) were increased as the SID-Lys:ME ratio in diet increased. Based on a broken-line model, the estimated SID-Lys:ME ratio to maximize litter weight gain was estimated to be 3.05 g/Mcal.  相似文献