樱桃沟：红樱桃造就绿色支柱产业

近年来，北京市科委采取多项措施，不断推进区域优势产业发展，重点支持“一区一品”优势产业发展，使得一批独具特色的优质品种脱颖而出，促进了区域经济的发展，并带动了广大农民增收致富。[编者按]     

樱桃谷鸭复合添加剂试验研究

采用研制的樱桃谷鸭专用复合添加剂（ＤＳＭ）分别对７００羽樱桃谷鸭父母代种鸭和５００羽商品代肉鸭进行饲喂试验,结果表明：试验组种鸭４０周龄平均产蛋率比对照组提高９．６５％（Ｐ＜０．０１）,受精率提高８．７６（Ｐ＜０．０１）,饲料报酬提高１２．５（Ｐ＜０．０１）;在对商品代肉鸭的饲喂试验中,试验组肉鸭７周龄平均体重比对照组多增９．８２％（Ｐ＜０．０１）,饲料报酬提高９．１％,差异极显著（Ｐ＜０．０１）．     

酸樱桃果实有效成分及药理作用的研究

酸樱桃果实营养丰富、均衡,含有大量的维生素(VA,VB,VC)和矿物质(K,Ca,Fe),而糖类、脂肪、热量的含量较低;尤其富含花青素、各种花色苷、褪黑激素、槲皮素、异槲皮素和其他有效成分.大量研究发现它们具有显著的药理作用,如调节睡眠、清除自由基、抗氧化作用、抗炎、镇痛、抗癌、预防心血管疾病、降低血糖、延缓衰老等.因此,对酸樱桃果实有效成分及药理作用进行了研究.     

十八颗樱桃的教育启示

有这么一则小故事：有一次耶稣带着他的门徒彼得远行，途中发现一块破烂的马蹄铁，耶稣就让彼得把它捡起来。不料彼得懒得弯腰捡，假装没听见。耶稣没说什么，弯腰捡起了马蹄铁，用它从铁匠那儿换来三文钱，又用这钱买了十八颗樱桃。     

樱桃插根育苗技术

樱桃插根育苗技术￥鄢陵县林业工作站＠王梦珍樱桃插根育苗技术鄢陵县林业工作站王梦珍樱桃为我国栽培历史悠久的果树，它结果早，寿命长，易管理。果实鲜丽诱人，味甜多浆，营养丰富。不但可生食，还可制成罐头、樱桃酱、樱桃汁、樱桃脯等。但是，近年来由于多种原因，樱桃资源...     

川西北甜樱桃引种试验初报

甜樱桃引进到四川西北部栽培，结果表明，能够开花结果，且具有丰产潜力。前期生长势旺盛，１年抽梢２－３次，顶端新梢１年生长１ｍ以上，５年生以后生长势逐步减缓；     

“生死与共”乃天性

渡渡鸟与卡伐利亚树地处热带的毛里求斯是印度洋上的岛国。几百年前,在这里生长着一种高大的卡伐利亚树,树高可达30m左右,树围可达4m左右。当年,卡伐利亚树遍布全岛,是岛上宝贵的木材资源;如今,岛上残存的卡伐利亚树已寥寥无几,而且剩下的都是一些年老的树。人们发现,这种树尽管年年开花结果,却没有一     

Evaluation of genetic diversity and relationships within and between two breeds of duck based on microsatellite markers

The genetic diversity of two natural populations (M, N) of Beijing duck (Anas platyrhynchos) and 11 artificially selected lines of Beijing duck (A, B, E-L, O) from China Gold Star Duck Production Ltd., along with two Cherry Valley duck lines (C and D) from the British Cherry Valley Livestock Division, was evaluated using 18 microsatellite markers covering 16 linkage groups. A phylogenetic tree of the 15 populations of duck, formed of four main branches, was constructed from Nei’s D_A genetic distance. The mean genetic differentiation index (F_ST) in all loci, Nei’s standard genetic distance (Ds), and the genetic distance D_A between the Beijing duck and the Cherry Valley duck were 0.075, 0.143 and 0.142, respectively. These results demonstrated a high degree of genetic similarity between the two breeds and supported the hypothesis that the Cherry Valley duck was derived from the Beijing duck. The F_ST matrix of seven clusters of Beijing duck suggested that the efficiency of selection was not significant to some extent and should be supplemented by marker-assisted selection.