早红宝石油桃栽培六要点

油桃表面光滑无毛,色泽鲜红夺目,果实脆硬多汁,风味芳香,营养丰富,广为人们所喜爱。一、建园宜选择地势高,排水条件好,保水透气的沙壤土建园,易积涝地块不宜栽种,雨季注意及时排水防渍。早红宝石油桃生长势中庸,可适当加大栽植密度,露地栽培为行距3米,株距2米,保护地栽培行距为1.2米,株距为1米,3年后可隔株间伐。     

采叶,还是采籽?——传统茶产业面临新选择

茶被发现和利用5000多年以来,一直是采摘叶子利用叶芽作为使用价值的,茶叶籽只是作为种子主要用于繁殖。随着无性系繁殖扦插技术的发明,种子繁殖栽培不再是人们的选择,所以茶籽的用途很长一段时间内处于自然生长废弃茶园的状态。上世纪八十年代起,业界开始了茶叶籽油榨取技术的研究。茶叶籽油的诞生,与其说是为原先废弃茶园的     

浅新周围环境对猪的生长影响

周围环境的好坏直接影响猪的生长发育和发病率的高低。创造一个良好的周围环境和舍内环境对猪的生长效益意义重大。也是我们养殖场容易忽视的地方。因此，我们就此问题与大家共同探讨。猪的生长环境分外环境和内环境。两者相互依存，相辅相成，共同影响猪的生长。     

九寨沟县甜樱桃主要病虫及防治初探

甜樱桃果实色泽艳丽,味美甘甜,素有＂春果第一枝＂之称,具有适应性强、经济价值高等特点。九寨沟县自1996年引种欧洲甜樱桃以来,目前已发展5000多亩。     

氮素对紫香无核葡萄叶片叶绿素含量的影响

氮素是一切植物必需的大量营养元素之一,它是农作物生长的重要物质基础。在实际生产中,氮素营养状况对葡萄的新陈代谢、形态建成、阶段发育有很大影响。适量施用氮肥不仅能提高叶片的光合速率,增加光合叶面积,改善光合性能,达到"以氮增     

珍贵用材、优良观赏树种愈疮木

<正>愈疮木(Guaiacum of ficinale L.)别名:铁梨木、绿檀、玉檀香、圣檀木。为蒺藜科愈疮木属植物,是分布在热带美洲的著名硬重木材用材树种,是牙买加的国花。     

水稻防早衰 用好水、肥、药

水稻早衰是水稻生育后期(抽穗至成熟)根、茎、叶功能过早衰退的一种"未老先衰"现象。其主要表现和为害是:后期叶片功能不同程度地提早衰退,绿叶面积减少,叶片光合能力和光合效率降低,导致植株体内营养物质的制造、运输和积累受阻;根系生长衰弱,软绵无力,在土壤通透性差、还原性强的稻田,还有少量黑根发生;早衰植株由于后期光合产物减少,所以秕粒率高,对水稻产量影响很大。     

笋竹两用毛竹施肥效果试验初报

毛竹Phyllostachys edulis（carr.）Lehaie是我国面积最大、分布最广、用途最多的主要经济竹种。毛竹资源在我国森林资源中,有着十分重要的地位。福建省现有毛竹林面积60多万公顷,占全国的23%左右。毛竹生长快、成材早、产量高、砍伐周期短,在整个生长过程中需要消耗大量的养分     

铺地竹叶片对结球生菜种子发芽及幼苗生长的影响

采用基质盆栽试验,研究了铺地竹(Sasa argenteastriatus E.G.Camus)叶片对结球生菜(Lactucasativa L.var.capitata L.)种子萌发和幼苗生长的影响,结果表明,铺地竹叶片粉末对结球生菜种子的萌发和幼根生长具有一定的抑制作用,随着浓度的增加抑制作用增强,在50～200 g/m2的范围内,幼根抑制率为12.15%～28.91%。在50～100 g/m2的用量下,铺地竹叶片对结球生菜苗长表现为促进生长作用,而在200 g/m2时,则表现为抑制生长作用。施用铺地竹叶片后3 d、6 d、9 d和12 d,结球生菜幼苗的叶绿素含量特别是叶绿素a的含量显著减少,随着基质中叶片粉末浓度的增加,结球生菜叶绿素含量降低,叶绿素a含量高低依次为对照、低浓度处理、中浓度处理、高浓度处理。随着处理后时间的延长,竹叶对结球生菜叶片叶绿素a含量的影响减弱。这个结果进一步验证了自然条件下铺地竹叶片对植物生长的化感效应,说明其具有开发植物源除草剂的潜力,为研究铺地竹叶片中的化感物质提供了佐证。     

Effect of Dietary Supplementation with Hydrolyzed Wheat Gluten on Growth Performance,Cell Immunity and Serum Biochemical Indices of Weaned Piglets （Sus scrofa）

To investigate the effects of dietary supplementation with hydrolyzed wheat gluten (HWG) on growth performance, cell immunity and serum biochemical indices of weaned piglets, 160 crossed (Large White×Landrace) and weaned piglets were randomly divided into 4 treatments with 4 replicates of 10 piglets each. The piglets in each treatment were fed an experimental diet containing either 0 g kg-1 HWG (control group), 30 g kg-1 HWG (3% HWG group), 50 g kg-1 HWG (5% HWG group), or 2.5 g kg-1 glycyl-L-glutamine (0.25% Gly-Gln group). The results showed that the diarrhea rates in 3% HWG and 5% HWG groups were significantly lower than in control group from d 1 to 14 (P＜0.05), while the average daily gain (ADG) in each of two groups was increased (P＞0.05). When compared with control group, dietary supplementation with 3% HWG increased the ratio of CD4+:CD8+ and the ratio of serum albumin and globulin concentrations (A:G) on d 14 and 28, as well as the proliferation of T- and B-lymphocytes (P＞0.05) on d 28. In addition, on d 14 and 28, the A:G ratio in 5% HWG group was significantly higher than in control group (P＜0.05), while the ratio of CD4+:CD8+ increased slightly (P＞0.05). Interestingly, 0.25% Gly-Gln group had higher proportion of CD3+ (P＞0.05) and CD4+ (P＜0.05) on d 14 than control group, but growth performances of 0.25% Gly-Gln group were negatively affected at all experiment stages. These results suggested that HWG might improve the growth performance of piglets by strengthening cell immunity and decreasing the occurrence of diarrhea during the prophase after weaning.