Categorization of the pelvic limb standing posture in nine breeds of dogs

The objective of the study was to categorize objectively nine breeds of healthy dogs according to pelvic limb standing posture. A total of 135 dogs from different breeds were used and the standing angles of the hip, stifle, and tarsal joints, together with the percentages of the greater trochanter, patella and tuber calcanei heights, with respect to crista iliaca height, were used as discriminant variables for the categorization of pelvic limb posture. All included breeds were allocated to three groups of the standing pelvic limb posture. The best discriminant variables between the three groups were the percentage of patellar height, and the standing angles of the stifle and tarsal joints. German shepherds, Anatolian shepherds, golden retrievers, Rottweilers, Belgian Malinois and Dobermann pinschers were well separated between 89% and 100% success rate for the categorization. The minimal success rate was determined in Berner sennenhunds as the ratio of 75%. It was also determined that Dobermann pinschers had the straightest pelvic limbs, while German shepherds had the most angulated pelvic limbs. Further studies are required to document the impact of postural differences in active and passive structure diseases of the locomotor system of the pelvic limb among dog breeds.     

Successful small intestinal resection and anastomosis in a late term broodmare with colic via a standing left flank laparotomy

A late term broodmare presented with low‐grade intestinal colic. Clinical findings were consistent with a small intestinal lesion requiring surgical intervention. The risks of general anaesthesia to the fetus, combined with clinical findings in an otherwise quiet natured horse influenced the decision to choose an alternative standing left flank approach first. A small intestinal resection and anastomosis was performed successfully and the mare delivered a healthy foal without complications a month later. Standing colic surgery might be a preferred alternative to general anaesthesia in certain circumstances as discussed in this case report.     

嫁接冬瓜干物质以及氮、磷、钾养分累积与分配特性研究

嫁接冬瓜和自根苗冬瓜需肥规律存在一定差异,明确嫁接苗养分吸收利用规律可以提高嫁接苗冬瓜的产量.采用大田栽培试验,研究嫁接冬瓜干物质和N、P、K养分吸收利用动态变化.结果表明:(1)嫁接苗和自根苗冬瓜干物质、氮、磷、钾养分吸收积累特征基本一致,各生育期干物质、氮、磷、钾养分净吸收积累和累积速率随着生育期推进不断递增,但嫁...     

水稻无盘抛秧剂旱地育苗生理机理研究

研究了无盘旱育秧苗与塑盘旱育秧苗、常规旱育秧苗生理机能的差异。结果表明：无盘抛秧剂包衣稻种具有吸水速度快、吸水量大的特点,并起到蓄水保水作用;无盘旱育秧苗的叶片叶绿素含量、光合速率、植株伤流量、植株相对含水率、植株可溶性糖及含氮量、植株根和叶SOD活性等生理指标,均优于塑盘旱育秧苗和常规旱育秧苗;无盘旱育秧苗素质明显提高,抛栽后发根早、发根多、立苗速度快。     

大菱鲆健康苗种高产培育技术

介绍了在大菱鲆苗种培育过程中,添加微藻、有益复合菌、弧菌疫苗,在稳定的水环境中培育健康苗种,取得较高的成活率。     

4种外源激素处理对羊草种子萌发和幼苗生长的影响

研究了100~600μg/g赤霉素(GA3)和吲哚乙酸(IAA)、25~100μg/g 6-苄氨基嘌呤(6-BA)和脱落酸(ABA)对羊草种子萌发和幼苗生长的影响。结果表明,100~300μg/g GA3和IAA以及25μg/g 6-BA对羊草种子的萌发最终表现为促进作用,总体效果为GA3>IAA>6-BA。当GA3和IAA浓度大于400μg/g或6-BA浓度大于50μg/g时对羊草种子的最终发芽率均表现为不同程度的抑制;25~100μg/g的外源激素ABA对羊草种子萌发没有抑制作用。GA3处理均能显著促进羊草幼苗的伸长,IAA和6-BA则表现为不同程度的抑制作用;GA3、IAA和6-BA 3种促进激素对羊草的根长和根冠比均表现为抑制作用;25~100μg/g ABA对羊草苗长、根长以及根冠比没有显著影响。     

硅对盐胁迫下葡萄幼苗生理效应的影响

以酿酒葡萄"赤霞殊"(Cabernet Sauvignon,CS)1年生扦插苗为试材,采用营养液水培系统,研究了根施外源硅(K2SiO3·9H2O,Si)对盐(50 mmol/L NaCl)胁迫下赤霞珠葡萄幼苗叶片生理生化特性的影响.结果表明:盐胁迫处理下,葡萄幼苗叶片超氧阴离子(O2-')产生速率加快,过氧化氢(H2O2)、丙二醛(MDA)含量和相对膜透性增加;超氧化物歧化酶(SOD),过氧化物酶(POD)和过氧化氢酶(CAT)活性增强;组织含水量降低;施用2.0mmol/L Si明显抑制了O2-、H2O2和MDA的积累,增加了组织含水量,并进一步提高了抗氧化酶SOD和POD的活性.说明外源Si可通过提高盐胁迫下葡萄幼苗体内的抗氧化酶活性,从而降低活性氧(ROS)水平,一定程度上减轻盐胁迫对植株所造成的细胞膜脂过氧化伤害,增强其耐盐性.     

番茄穴盘育苗基质特性及育苗效果研究

为了筛选出适宜北京地区春茬番茄的穴盘育苗基质,并明确其物理和化学性质,以提高育苗基质的标准化,推动育苗技术精准控制的标准化进程,选取了北京地区各大育苗场常用的3种商品基质和6种以草炭、蛭石、珍珠岩为主要原料复配的自配基质,用于番茄穴盘集约化育苗,分析育苗基质的理化性质及育苗效果。结果表明:A3处理(北京绿穑生物商品基质)番茄幼苗茎粗最大,较CK(草炭、蛭石、珍珠岩体积比为3∶1∶1)增加13.1%,根冠比和壮苗指数也均最大,分别为0.132和0.069,A5处理(草炭、蛭石、珍珠岩体积比按3∶1∶1混合,每穴添加1 g基质伴侣)仅次于A3处理,两处理春季育苗效果好,建议进行推广应用。     

苗期夜温对番茄畸形果发生的影响

试验表明番茄苗期低夜温不仅提高了畸形果发生率，而且也提高了畸形果平均级数和综合指数，并增加了畸形果的类型，同时乱形果在畸形果中所占的比例也增大。试验还认为：引起番茄畸形果大量发生的界限温度在大于６℃和小于１２℃的范围内，低温所需时间为幼苗２片子叶充分展开后１０～１６天，幼苗低温敏感期为２～４片真叶展开期。因此，番茄育苗期间应避免２～４片真叶展开期夜温低于１２℃。     

果蔗脱毒种苗组培快繁技术研究

采用不同浓度的6-BA对果蔗进行了茎尖分生组织的诱导和幼芽增殖试验研究,利用不同状态的培养基对增殖芽进行了培养。结果表明,当6-BA浓度为4-5mg／L时,比较适宜于果蔗茎尖分生组织的诱导。在幼芽增殖前期．6-BA的浓度采用2-3mg／L;在将进入生根阶段时,6-BA的浓度采用0．5-1．5mg／L,有利于获得粗壮的幼苗。果蔗幼芽在增殖阶段。适宜采用液体培养基,可降低成本。