首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   146篇
  免费   26篇
  国内免费   1篇
林业   9篇
农学   3篇
  20篇
综合类   9篇
农作物   4篇
水产渔业   14篇
畜牧兽医   97篇
园艺   2篇
植物保护   15篇
  2023年   2篇
  2022年   4篇
  2021年   6篇
  2020年   9篇
  2019年   8篇
  2018年   8篇
  2017年   9篇
  2016年   11篇
  2015年   8篇
  2014年   8篇
  2013年   12篇
  2012年   11篇
  2011年   9篇
  2010年   8篇
  2009年   12篇
  2008年   5篇
  2007年   4篇
  2006年   3篇
  2005年   3篇
  2004年   4篇
  2003年   1篇
  2002年   2篇
  2000年   1篇
  1999年   3篇
  1998年   4篇
  1997年   2篇
  1996年   2篇
  1995年   2篇
  1992年   3篇
  1990年   5篇
  1989年   2篇
  1988年   1篇
  1984年   1篇
排序方式: 共有173条查询结果,搜索用时 15 毫秒
171.
This study describes the osteology and radiology of the pelvic limb in maned wolves. Ten (five live and five dead) maned wolves (Chrysocyon brachyurus), five males and five females, aged from 2 to 7 years old were used. Digital radiographs were taken and recorded for both pelvic limbs in all animals. Osteology was correlated with the radiographic images. The pelvis had a rectangular shape, and the obturator foramen (foramen obturatum) was oval. The femoral neck (collum femoris) was short and thick. The greater trochanter (trochanter major) extended proximally to near the dorsum of the femoral head (caput ossis femoris). The lateral femoral condyle (condylus lateralis) was larger than the medial condyle (condylus medialis), and the intercondylar fossa (fossa intercondylaris) had a slightly oblique orientation. The proximal tibia displayed medial and lateral condyles with the medial larger. The femur was slightly shorter than the tibia. Seven tarsal bones (ossa tarsi) were present, four long metatarsal bones (ossa metatarsalia II ‐ V) and a short first metatarsal bone (os metatarsal I).  相似文献   
172.
173.
In this study, the effects of days postburning and calcium oxide (CaO) on the fermentation, aerobic stability and nutritional characteristics of sugarcane silages for finishing Nellore steers were investigated. Silages were prepared in minisilos from in natura and burned sugarcane that remained in the field 1 and 10 days postburning (1‐day burned and 10‐day burned, respectively). Next, forages were left untreated or treated with CaO (10 g/kg fresh forage). Compared to that in untreated silages, CaO application increased the dry‐matter (DM) recovery of in natura, 1‐day and 10‐day burned silages (< 0.001) by 67, 179 and 209 g/kg DM respectively. The CaO treatment increased (< 0.001) the aerobic stability of the in natura and 10‐day burned silages by 62.7 and 24.7 hr respectively. In a feedlot experiment, feeding 1‐day burned silage reduced DM intake of steers throughout the feedlot period (0–93 days; < 0.05) compared with that of steers fed in natura silage diet, but the average daily gain (ADG) was lower (= 0.006) only during the adaptation period (?0.16 kg/day; 0–28 days). The CaO application decreased DM intake (= 0.007; ?1.17 kg/day) and ADG (< 0.001; ?0.13 kg/day) of steers only during the adaptation period likely owing to low silage palatability caused by increased Ca and butyric acid concentrations (≥11.6 g/kg DM). We recommend feeding beef cattle with CaO‐treated burned sugarcane silages in low‐dietary concentration because of its high butyric acid concentration.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号