共和地区施肥对多叶老芒麦生产性能的影响

试验结果表明,施N比施P更有利于多叶老芒麦叶面积的增加、叶片干物质的积累,且施N后鲜草产量和种子产量明显比施P的高,而N、P合施后会得到更大的经济效益,其中以N10 P10效果更优：亲种后的第二年和第三年两年的年均鲜草产量可达7844．55kg／hm^2,种子产量可达1500．45kg／hm^2。     

硼肥、钼肥对提高三叶草种子产量的效果

1984年对红三叶、白三叶进行了喷施不同浓度的硼肥、钼肥用以提高种子产量的试验。试验证明在轻度缺硼土壤中(含硼在0.57ppm左右),喷施硼肥能显著提高红三叶、白三叶种子的产量,其经济效益显著,在基本上不缺硼的土壤中(即土壤含硼量在1.09ppm以上)喷施钼肥也能显著提高红三叶种子的产量。     

甘草种子人工繁育暨配套栽培技术研究初报

野生乌拉尔甘草Glycyrrhiza uralensis采用适宜的人工栽培技术,可在生长第5年进入种子生产期,产量达292.5 kg/hm2,种子质量及其栽培学性状都优于野生甘草种子.自繁甘草种子经育苗,用倾斜式方法移栽定植,密度15万株/hm2,于生长第3年秋冬时采挖,甘草产量达7 140kg/hm2,等级草比例达60%以上,甘草酸等有效成分含量均达到药用指标.不同采挖季节对甘草品质有显著影响,秋末冬初采挖时品质最好.不同栽植方式,施肥方法、灌水次数及生育年龄对甘草产量都有明显影响,多因素综合考虑,以移栽后第3年采挖经济效益最好.     

施肥对青引1号燕麦产量及构成性状的影响

为探究施肥对燕麦鲜草、秸秆和种子产量的影响,找出限制燕麦鲜草、秸秆和种子产量提高的养分因子,筛选出实现经济效益最大的施肥配方,本研究以青引1号燕麦(Avana sativa cv.Qingyin No.1)为对象,于2010年在青海省湟中县分析不同的氮、磷和钾配方施肥对燕麦产量及其构成因素的影响。结果表明,氮素为限制燕麦鲜草产量提高的主要养分因子,施氮能显著提高燕麦株高和鲜草产量,N337.5P105K60处理鲜草产量最大,为66 194 kg·hm-2,比对照增产44.9%。磷素为限制燕麦种子产量提高的主要养分因子,施磷能增加燕麦有效分蘖数、小穗数,N225P157.5K60处理下燕麦籽粒产量最大,为6 678 kg·hm-2。经过经济效益分析,N225P105K60施肥处理获得的综合收益最大,饲草田达到18 435.3元·hm-2,种子田达到22 877.5元·hm-2,分别比对照增收4 500.9和4 597.5元·hm-2。     

四川牧草种子生产现状、存在的问题及建议

概述了四川牧草种子生产的分布区域、种植面积,主要栽培品种的产量与质量,栽培管理技术,种子销售、价格及经济效益等现状。同时,提出了种子生产存在的问题和发展种子生产的建议。     

收获时间对老芒麦种子产量的影响

以生长2年和生长3年老芒麦为试验材料,研究收获时间对其种子产量的影响。结果表明,随着老芒麦种子的成熟,收获的种子产量逐渐增加,在盛花期后26-27d收获可以获得较高的种子产量,延迟收获种子产量则呈下降趋势。生长3年老芒麦同生长2年老芒麦相比,其种子产量下降50%左右。     

美洲的零耕草原改良和零牧草地

<正> 几十年来,在美洲草原地带开展的所谓“绿色革命”,目的在于通过改良草地以提高饲草产量及质量,从而达到增加畜产品产量的目的。同时力求减少燃料、肥料、种子、人工及机械的费用,努力提高经济效益。这种绿色革命赖以进行的基础则是草原改良和零牧(Zero grazing)     

生长调节剂对毛叶苕子种子产量及产量性状的影响

以"蒙苕一号"毛叶苕子为研究对象,采用随机区组设计于2014年在内蒙古武川县研究了喷施3种生长调节剂(多效唑、矮壮素和缩节胺)对毛叶苕子鲜草产量、种子产量及产量性状构成要素的影响。结果表明:使用生长调节剂抑制了毛叶苕子生长,降低了鲜草产量;显著增加了毛叶苕子单株结荚数(P0.05),以喷施矮壮素2次单株结荚数最多,平均每株72.7个;显著增加了毛叶苕子种子产量(P0.05),以喷施矮壮素2次种子产量最高,其中喷施多效唑种子产量增加了24.3%,喷施矮壮素种子产量增加了20.8%~27.0%,喷施缩节胺种子产量增加了10.5%~15.6%。     

“威—24”大麦不同刈割次数的效益观察

“威二四”大麦是我省从墨西哥引入的优良品种。产量高,亩产种子高达500千克以上;品质好,其籽实含粗蛋白12％,尤其是含0.68％的赖氨酸,比普通小麦高出近一倍。又属于粮草兼用型作物,提早播种刈割二次基本不影响种子的产量,并可同时每亩收青3000千克和收种子450千克。 我县1990年引种后反映良好。为指导农户适时刈割以获得最佳营养和最佳经济效益,我站从1992年10月到1993年5月做了栽培观察。 1 观察场地及方法:我们在将军镇专业户康兴木的一块旱田中种植。按随机区组设计作交叉重复试验。即:     

苜蓿新品种应用技术及经济效益对比分析

对引种苜蓿的生产性能及其经济效益研究结果表明:在试验地条件下,苜蓿品种不同,干草和种子产量及其经济收入也明显不同,多数品种都表现出较高的产量和经济效益。其中,杂种1代、Makiwakaba原种、Baralfa、阿尔冈金、牧歌40Hz、金皇后、杂种4代、甘农3号等8个品种表现出较高的产草量和经济效益;Euver99、Makiwakaba98、Makiwakaba原种、Vertus原种、Euver98、爱菲尼特、甘农3号等7个品种表现出较高的种子产量和经济效益。在水肥条件较好的地块,国外的苜蓿品种产草量较国内的品种高18%～27%。     

鸡肾上腺神经的分布──WGA－HRP法研究

将ＷＧＡ－ＨＲＰ注入７５～９０日龄鸡肾上腺内，追踪支配鸡肾上腺传出神经元的胞体，结果显示：鸡肾上腺接受交感神经节前和节后神经元的支配，以节后神经元支配占主导；迷走神经的传出神经元也支配鸡肾上腺，并处于次要地位。     

EFFECT OF DISRUPTION OF THE SEBACEOUS LAYER OF THE SHEEP''S SKIN ON THE INCIDENCE OF FLEECE-ROT

It was postulated that integrity of the sebaceous layer on the skin is important in maintaining resistance to fleece-rot. This hypothesis was tested in an experimenta of a 2 x 2 factorial design in which sebaceous layer disruption and wetting were the 2 treatments. The sebaceous layer was disrupted by applying a light petroleum solvent to the skin of the sheep. Fleece-rot occurred in all sheep (20) that were both wetted and had the sebaceous layer disrupted while 9/19 of those wetted but without the sebaceous layer disrupted developed fleece-rot. The fleece-rot lesions observed were more severe in sheep in the disrupted wetted treatments than in the intact wetted treatment. Interpretation of these differences was complicated by a possible reaction of the skin to the solvent used. The differences were not due to an effect of treatment on fleece wettability. No fleece-rot developed in the sheep not wetted and application of the solvent alone did not induce fleece-rot.     

r－球蛋白制剂对肉用雏鸡法氏囊发育影响的超微结构研究

为研究ｒ－球蛋白制剂对雏鸡法氏囊发育的影响，１４０羽２日龄ＡＡ肉鸡被随机等分为两组。试验组鸡分别在１、２和３周龄期注射血清ｒ－球蛋白，１０ｍｇ／羽。对照组不予注射。然后用透时电镜（ＴＥＭ）观察两组鸡法氏囊的形态结构。结果表明：试验组与对照组相比，２周龄期，法氏囊淋巴滤泡内淋巴细胞数量增加，核内常染色质、胞质内线粒体、溶酶体和糙面内质网均增加。３周龄期，中淋巴细胞比例增加、淋巴细胞分裂较快。４周龄期，淋巴滤泡内“冠区”结构明显，ＩＳＥ分泌功能活跃。提示ｒ－球蛋白制剂可能对雏鸡法氏囊发育和淋巴细胞的增殖与分化有促进作用。本文还对ｒ－球蛋白制剂增强幼禽抗病能力的作用机理进行了探讨。     

镉中毒解毒机理的研究：硒化合物的预防和治疗作用初探

对大鼠组织胞液(Cytosol)的体外试验结果表明:亚硒酸钠、硒酸钠及硒化钠以明显影响[~(109)Cd]标记的氯化镉在组织胞液中的分布。硒酸钠、亚硒酸钠有较强的封闭金属硫蛋白(MT)与镉结合部位、激活分子量较大的蛋白质,捕获胞液中[~(109)Cd]的作用,还可使已经和MT结合的[~(109)Cd]被剥离,随后,[~(109)Cd]转入分子量较大的蛋白质上;亚硒酸钠还可使[~(109)Cd]转入分子量为32000～35000的蛋白质上。硒化钠仅有较弱的剥离与MT结合的镉,使之转入分子量较大的蛋白质上,但几乎不能阻止镉与MT结合。镉与大、中分子量蛋白质结合力远较它与MT的结合力弱,因而以能有利于镉被排出体外。     

THE EPIDEMIOLOGY OF SQUAMOUS CELL CARCINOMA OF THE PERINEAL REGION OF SHEEP

SUMMARY A high prevalence of squamous cell carcinoma of the perineal region of ewes was detected in the wheat belt area of Western Australia. A postal survey of 80 farms was conducted in the area, seeking information on the epidemiology of the condition, based on the farmers identification of the disease. Eighty-two per cent of flocks surveyed were affected, the mean prevalence in ewes of all ages being 2.29% (range 0.12% to 4.0%). The prevalence increased with age, from 0.05% in 1- to 2-year-old ewes to 3.09% in ewes over 5 years of age. The prevalence in the population of 121,605 ewes on all farms (affected and unaffected) surveyed, was 0.93%. The majority of lesions (88.9%) involved the vulva. The tail was affected in 23.8% of cases and the perineum in 12.8%. Affected ewes were usually destroyed and were a direct financial loss. Only 2 farmers reported the condition in rams, and 5 in wethers. Causal factors were not identified, although the radical Mules operation, time of shearing, and solar radiation were implicated.     

运粮河沿岸退化草地适用牧草品种的鉴选

在运粮河中游两岸建立优质牧草品种鉴定辅，对新疆大叶紫花蓿、红三叶、草木樨、沙打旺、狐毛草和羊草４个豆科和２个和禾本科计６个品种牧草苜蓿十羊草组合牧进行适应性、抗逆性以及牧草产量和质量的鉴定筛选。     

ULTRASONOGRAPHY OF THE SOLAR ASPECT OF THE DISTAL PHALANX IN THE HORSE

Ultrasonographic examinations were performed on the solar aspect of the distal phalanx of 10 feet of five normal live horses (Group 1), 22 feet of seven normal cadavers (Group 2), and nine feet of five horses with pathology of the dorsal solar aspect of the distal phalanx (Group 3). Lateromedial radiographs of the distal phalanx were made in all groups, and in Group 2, digits were sagitally sectioned after imaging. The ultrasonographic and radiographic appearance of the sagittal solar aspect of the distal phalanx was described. Measurements of the distance between the sole and the distal tip of the distal phalanx (A), the solar aspect of the apex of the frog and the distal phalanx (B), and the body of the frog's surface and flexor surface of the distal sesamoid bone (C) were made ultrasonographically, radiographically, and on the sectioned cadaver specimens. There was no statistical difference between the radiographic, ultrasonographic, and direct cadaver measurements in A and C. In B, there was a statistical difference between the radiographic, ultrasonographic, and cadaver measurements-most likely as a result of the difference in trimming of the frog apex. Ultrasonographic and radiographic examination of the nine feet of the five horses in Group 3 were performed and the abnormalities described. Color flow and power Doppler ultrasonography were performed on the normal sagittal solar distal phalanx, on the impar distal sesamoidean ligament, and at the insertion of the deep digital flexor tendon on the facies flexoria of the distal phalanx. Power Doppler in these horses showed blood flow at 0.16-0.48 kHz at the tip of the distal phalanx and at 0.16 kHz at the deep digital flexor tendon insertion and in the impar distal sesamoidean ligament. Using color flow Doppler in normal horses mean blood flows ranged from 1.8 to 5.4 cm/s at the tip of the distal phalanx and 1.8-2.0 cm/s at the deep digital flexor tendon insertion and in the impar distal sesamoidean ligament.     

ANATOMIC REFERENCE FOR COMPUTED TOMOGRAPHY OF THE HEAD OF THE FOAL

The purpose of this study was to produce an anatomic reference for computed tomography (CT) of the head of the foal for use by radiologists, clinicians, and veterinary students. The head from each of 2 foals, euthanized for reasons unrelated to head pathology, was removed and prepared for CT scanning. Using a third-generation CT scanner, 5-mm contiguous transverse images were acquired. The heads were then frozen and sectioned using a band saw, with the cuts matched as closely as possible to the CT slices. The anatomic sections were photographed and radiographed. The radiographs and anatomic photographs were digitized and matched with the corresponding CT image. Each CT image was compared with its corresponding radiographic and anatomic section to assist in the accurate identification of specific structures. Clinically relevant structures were identified and labeled in corresponding images (CT, anatomic slice, and radiograph of slice). Only structures identified in the CT image were labeled in 1 of the other 2 images. Sagittal (reference) images of the horse's head were reconstructed from the transverse CT scans, and were used to indicate the level from which each of the transverse images was obtained. Corresponding labeled images were then formatted together with a legend for identification of specific anatomic structures.     

THE ROLE OF INHIBITED LARVAE IN THE EPIDEMIOLOGY OF OVINE HAEMONCHOSIS

Three paddocks were contaminated with Haemonchus contortus eggs from early spring to mid summer by yearling sheep. In Paddock 1, all contamination was derived from worms that had been previously inhibited in their development. The contamination in Paddock 2 was produced only by infections recently acquired from pasture, and in Paddock 3 contamination was attributable to both sources. When the yearling sheep were replaced in mid-summer by newly weaned lambs, severe outbreaks of haemonchosis occurred on all paddocks. It was concluded that inhibited H. contortus larvae are capable of producing sufficient eggs, when they resume development, to initiate an outbreak of haemonchosis in susceptible sheep.     

建坪与管理因素对运动场草坪密度影响的研究

以修剪高度、播种量、修剪频率和施Ｎ量为因素，利用四因素饱和Ｄ－最优设计，对运动草坪密度进行探讨，最佳四因素水平为，修剪高度４．５ｃｍ，播种量１５ｇ／ｍ＾２，修剪频率５次／月，施Ｎ量６．７８ｇ／ｍ＾２。并建立了草坪密度与建坪四因素显著相关的回归模型。