Journal of Agriculture of The University of Puerto Rico最新文献_第8页

Resistance in Digitaria to Yellow Sugarcane Aphid, Sipha flava (Forbes) as Related to Temperature and Rainfall 马地黄对黄甘蔗蚜虫的抗性与温度和降雨量的关系

Journal of Agriculture of The University of Puerto Rico Pub Date : 2021-01-01 DOI: 10.46429/jaupr.v56i1.10884

A. J. Oakes, A. Sierra-Bracero

引用次数: 2

Efecto de la raza paterna y sexo de las crías en el crecimiento de conejos hasta las 13 semanas de edad 父系品种和后代性别对13周龄兔生长的影响

Journal of Agriculture of The University of Puerto Rico Pub Date : 2021-01-01 DOI: 10.46429/jaupr.v105i1.19642

Tatiana Tosado-Martínez, Katherine Domenech-Pérez

{"title":"Efecto de la raza paterna y sexo de las crías en el crecimiento de conejos hasta las 13 semanas de edad","authors":"Tatiana Tosado-Martínez, Katherine Domenech-Pérez","doi":"10.46429/jaupr.v105i1.19642","DOIUrl":"https://doi.org/10.46429/jaupr.v105i1.19642","url":null,"abstract":"La producción mundial de carne de conejo se basa en razas cárnicas; sin embargo, en Europa los cruces entre razas cárnicas y gigantes han resultado en canales de mayor tamaño. En las principales razas, las conejas alcanzan mayores tamaños adultos que los conejos. La presente investigación evaluó el efecto de la raza paterna y el sexo de las crías sobre la curva de crecimiento en conejos. Se compararon los pesos vivos (PV) semanales (primeras 13 semanas de vida; sexados a los 42 días) de la progenie de un padrote Nueva Zelanda Rojo (NZR; n=21) y de uno Gigante de Flandes (GF; n=31) con conejas cruzadas Californianas. Los datos de PV promedio individual (en el pre-sexado y post-sexado) se analizaron mediante el Proc GLIMMIX (SAS). En el pre-sexado no hubo interacción semana x padrote (P=0.3333) ni efecto de padrote (P=0.2051) afectando el PV de los conejos. Durante este periodo, el PV promedio de los conejos aumentó unos 641.50 g (P<0.0001). En el postsexado las interacciones semana x sexo x padrote (P=0.8821), sexo x padrote (P=0.2409), semana x padrote (P=0.1597) y semana x sexo (P=0.5663) no afectaron el PV. Sin embargo, se observaron diferencias en PV entre semanas (aumento total promedio de 1,417.61 g; P<0.0001), sexos (1,748.68±115.28 vs. 1,545.21±109.40 g en hembras y machos, respectivamente; P=0.0194) y padrotes (1,523.68±123.15 vs. 1,770.21±107.24 g en los hijos del NZR y del GF, respectivamente; P=0.0170) durante este periodo. Utilizar padrotes gigantes en madres cárnicas podría mejorar el crecimiento post-sexado de los conejos, especialmente en las hembras. \u0000 ","PeriodicalId":14937,"journal":{"name":"Journal of Agriculture of The University of Puerto Rico","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48456780","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Light sensors assess solar radiation vs. shade exposure of slick- and wild-type Puerto Rican Holstein cows 光传感器评估光滑型和野生型波多黎各荷斯坦奶牛的太阳辐射与阴影暴露

Journal of Agriculture of The University of Puerto Rico Pub Date : 2021-01-01 DOI: 10.46429/jaupr.v105i1.19634

H. Sánchez-Rodríguez, K. Domenech-Perez

{"title":"Light sensors assess solar radiation vs. shade exposure of slick- and wild-type Puerto Rican Holstein cows","authors":"H. Sánchez-Rodríguez, K. Domenech-Perez","doi":"10.46429/jaupr.v105i1.19634","DOIUrl":"https://doi.org/10.46429/jaupr.v105i1.19634","url":null,"abstract":"Anecdotal data suggest that slick-haired cows (SLICK) graze under solar radiation longer than their wild type-haired (WT) counterparts. However, to the authors’ knowledge, empirical data regarding the suggestion is scarce. This study aimed to use light sensors (HOBO Pendant MX) to study solar radiation exposure. Sensors (attached to a collar) were validated in 20 Holstein cows rotated from shade (0837 to 0906h) to sunlight (0907 to 0932h) and then back to shade (0933 to 1005h). After validation, sensors were used to compare the differences in solar radiation exposure between 10 SLICK and 10 WT Holstein cows. Data were analyzed by the GLIMMIX and FREQ procedures (SAS). Light intensity was greater under solar radiation than during the first (P<0.01) and second (P<0.01) shade periods (51,026.00±682.25; 2,282.40±647.64 and 1,907.27±626.28 lx, respectively). No differences were observed between shade periods (P=0.62). The SLICK cows spent more time under solar radiation than the WT cows (52.67 vs. 47.33%, respectively; P<0.01). Hair coat type and period interacted (P<0.01), with greater light intensities in SLICK than in WT cows under solar radiation (24,702±106.65 vs. 20,518±98.43 lx, respectively); but no differences were observed under shade (1,856±7.03 and 1,793.2±6.53 lx, respectively). The SLICK cows showed greater exposure time to direct solar radiation than their WT counterparts.","PeriodicalId":14937,"journal":{"name":"Journal of Agriculture of The University of Puerto Rico","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47480702","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

ANÁLISIS DESCRIPTIVO DEL EFECTO DE LA DURACIÓN DE LA ÉPOCA DE EMPADRONAMIENTO SOBRE LA EFICIENCIA REPRODUCTIVA Y PRODUCTIVA DE OVINOS CRIADOS EN ESTRÉS POR CALOR 登记期长短对热应激绵羊繁殖和生产效率影响的描述性分析

Journal of Agriculture of The University of Puerto Rico Pub Date : 2021-01-01 DOI: 10.46429/jaupr.v105i1.19640

Abner A. Rodríguez-Carías, John Fernández-Van Cleve

引用次数: 0

A Whitefly-Transmitted Golden-Yellow Mosaic Virus of Phaseolus lunatus in Puerto Rico 波多黎各一种由白蛉传播的月相蝇金黄色花叶病毒

Journal of Agriculture of The University of Puerto Rico Pub Date : 2021-01-01 DOI: 10.46429/jaupr.v56i1.10888

J. Bird, J. Pérez, R. Alconero, N. Vakili, P. Meléndez

引用次数: 3

Supplementation of dairy calves with digestive enzymes and fermentation products of Aspergillus oryzae and Aspergillus niger 犊牛补充米曲霉和黑曲霉消化酶及发酵产物的研究

Journal of Agriculture of The University of Puerto Rico Pub Date : 2021-01-01 DOI: 10.46429/jaupr.v105i1.19633

Melissa A. Vaz-Ramírez, J. Curbelo-Rodríguez, G. Ortiz-Colón

{"title":"Supplementation of dairy calves with digestive enzymes and fermentation products of Aspergillus oryzae and Aspergillus niger","authors":"Melissa A. Vaz-Ramírez, J. Curbelo-Rodríguez, G. Ortiz-Colón","doi":"10.46429/jaupr.v105i1.19633","DOIUrl":"https://doi.org/10.46429/jaupr.v105i1.19633","url":null,"abstract":"The effect of supplementation with Aspergillus oryzae and A. niger fermentation products and digestive enzymes on weight gain, growth, and health of Holstein (n=11) and Jersey (n=9) calves was evaluated. All calves, individually housed, were fed unpasteurized waste milk at 0600 (2 L) and 1800 (2 L) for 49 days. All calves were fed ad libitum a calf starter that contained 18% CP; 2.5% fat; 8% CF; 14% ADF; 1.5% Ca; 0.5% P; 0.20 mg/kg Se; 2,273 IU/kg vitamin A; and 66 g/Tm of Lasalocid. Treated animals (five Holsteins and four Jerseys) were fed 2 g of commercial mixture of A. oryzae and A. niger fermentation products and the digestive enzymes α amylase, pectinase, endoglucanase, β glucanase, xylanase, and mannanase. Weight and height were recorded weekly using a Nasco© measuring tape and measuring stick, repectively. There was no interaction of treatment by breed by period (P=0.9636). Treatment did not affect weight gain across periods (P≥0.7215). As expected, Holsteins were heavier than Jerseys (P=0.0284) and both breeds increased in weight over time (P<0.0001). Treatment did not affect the height at the hip (P=0.7971) or withers (P=0.4248). Holstein’s height at the hip for the treatment group (HT) was 80.8 cm ± 2.31 at 49 days and 80.5 cm ± 3.25 for the control group (HC). Jersey treatment group (JT) ended with 85 cm ± 1.98 whereas the control group (JC) ended with 82.1 cm ± 2.17 at the hip. Height at the withers for HT measured 75.3 cm ± 2.62 compared to 80.5 cm for HC. Moreover, calves in JT at the end of the experiment measured 79.9 cm ± 1.23 compared to JC 76.7 cm ± 2.59. Health status did not benefit from the supplementation of A. oryzae and A. niger in combination with enzymes (P=0.1444). Supplementation with A. oryzae and A. niger fermentation products and digestive enzymes did not increase weight gain, growth, or health status in Holstein and Jersey calves fed waste milk under the tropical conditions in Puerto Rico.","PeriodicalId":14937,"journal":{"name":"Journal of Agriculture of The University of Puerto Rico","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47692492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

CHARACTERIZATION OF COFFEE SHRUB BIOCHAR CHARGED WITH COW MANURE AND EFFECTIVE MICROORGANISMS 添加牛粪和有效微生物的咖啡灌木生物炭的特性研究

Journal of Agriculture of The University of Puerto Rico Pub Date : 2021-01-01 DOI: 10.46429/jaupr.v105i1.19639

J. A. Dumas, Joaquín A. Chong, Christian Rivera-Goyco

引用次数: 1

Gamma Radiation Effects on Biochemical Compojients of Puerto Rican Mangos 伽马辐射对波多黎各芒果生化成分的影响

Journal of Agriculture of The University of Puerto Rico Pub Date : 2021-01-01 DOI: 10.46429/jaupr.v56i1.10883

J. Cuevas-Ruíz, H. Graham, R. A. Luse

引用次数: 4

Comparative yield of carcass components of F1 crossbred rabbits sired by a New Zealand Red or a Flemish Giant buck 由新西兰红公鹿和佛兰德巨公鹿配种的F1杂交兔子胴体组成部分的比较产量

Journal of Agriculture of The University of Puerto Rico Pub Date : 2021-01-01 DOI: 10.46429/jaupr.v105i1.19635

Tatiana Tosado-Martínez, K. Domenech-Perez, H. Sánchez-Rodríguez

{"title":"Comparative yield of carcass components of F1 crossbred rabbits sired by a New Zealand Red or a Flemish Giant buck","authors":"Tatiana Tosado-Martínez, K. Domenech-Perez, H. Sánchez-Rodríguez","doi":"10.46429/jaupr.v105i1.19635","DOIUrl":"https://doi.org/10.46429/jaupr.v105i1.19635","url":null,"abstract":"La cunicultura mundial se centra en razas cárnicas como la Nueva Zelanda variedad roja (NZR). También existen razas ornamentales como la Gigante de Flandes (GF), que alcanzan gran tamaño adulto. En Europa los cruces F1 entre estas razas han mostrado un excelente rendimiento. El presente estudio comparó el desempeño de conejos de padre NZR (n=seis machos y seis hembras) o GF (n=nueve machos y nueve hembras) y madres Californianas cruzadas. A la edad de 91 a 93 d los conejos se pesaron (peso vivo; PV) y procesaron. Se obtuvieron los pesos de la canal, vísceras, piel, hígado, riñones, pulmones, corazón, patas (delanteras y traseras), lomo y grasa abdominal. Se calcularon los rendimientos de la canal, patas y lomo. Los datos se analizaron mediante Proc GLIMMIX (SAS). No hubo interacción padrote x sexo (P>0.05) ni efecto de sexo (P>0.05). Los conejos hijos del NZR resultaron inferiores a los del GF en PV (P=0.0048) y en los pesos de la canal (P=0.0314), vísceras (P=0.0172), piel (P=0.0004), riñones (P=0.0004), pulmones (P=0.0453) y patas traseras (P=0.0007). En promedio, las diferencias observadas fueron 380.51, 158.76, 80.64, 104.58, 2.40, 1.70 y 0.79 g, respectivamente. Los conejos hijos del padrote NZR mostraron un menor rendimiento (0.79%) en las patas traseras que los del GF (P=0.0181). No hubo diferencias entre padrotes para las demás variables (P>0.05). Los conejos 50% NZR presentaron canales más pequeñas que los de padre GF. Los cruzamientos de raza gigante x raza cárnica se deben considerar para maximizar la producción de conejos en Puerto Rico.","PeriodicalId":14937,"journal":{"name":"Journal of Agriculture of The University of Puerto Rico","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47924006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

ABSENCE OF A PROTEINACEOUS INVERTASE-REGULATORY SYSTEM IN SUGARCANE STEM TISSUE 甘蔗茎组织中缺乏蛋白逆转录调控系统

Journal of Agriculture of The University of Puerto Rico Pub Date : 2021-01-01 DOI: 10.46429/jaupr.v56i1.10892

N. A. Díaz, A. G. Alexander

引用次数: 0