【摘 要】
：
由美国卜内门公司(ICI)生产的一种生长抑制剂 pp333,它能抑制赤霉素的生物合成,而赤霉素是果树枝条生长伸长时起关键作用的控制激素。据美国农业部果树研究站科技工作者威廉
论文部分内容阅读
由美国卜内门公司(ICI)生产的一种生长抑制剂 pp333,它能抑制赤霉素的生物合成,而赤霉素是果树枝条生长伸长时起关键作用的控制激素。据美国农业部果树研究站科技工作者威廉斯(Williams)研究报导:他最初在红元帅和黄元帅以及梨、樱桃树上各生育阶段施用这种药剂后,观察到:①施药能大大减低枝条生长,不同施药浓度可使枝条生长减慢到停止,这样能减少修剪和节省劳力与时间。②施药能使果树形成更多的短果枝,也
Pp333, a growth inhibitor produced by the U.S. company Internal Medicine (ICI), inhibits gibberellin biosynthesis, a ghrelin that plays a key role in the elongation of fruit tree shoots. According to a research report by Williams, a research scientist at the USDA Fruit Tree Research Station, he first observed the application of this medicine at various stages of growth, including Red Marshal and Marshal Huang, and pear and cherry trees: Branches grow, different application concentration can slow down the growth of branches to stop, so that it can reduce the pruning and save labor and time. ② application of fruit trees can make more short branches, also
其他文献
农村面源污染问题已引起国家和民众的关注,在农村环境中农药和化肥的不合理施用、养殖业粪便及生活污水随意排放是造成农村面源污染的主要来源.根据农村面源污染产生途径及污
There have been many skewed cancer gene expression datasets in the post-genomic era. Extraction of differential expression genes or construction of decision rul
NaHCO3活化H2O2溶液在弱碱性条件下能高效降解苯甲硫醚和对氧磷,HCO4-通过溶剂辅助的氧转移机制实现对苯甲硫醚的初级氧化,而H2O2或HCO4-分解产生的超氧阴离子(O-2)是导致硫
多环芳烃(PAHs)广泛存在于环境中,主要来源于有机物质的不完全燃烧或高温热解,并主要通过干湿沉降、工业废水和生活污水进入河流水体.本文以桂林市饮用水源水为对象开展PAHs
农业非点源污染逐渐成为流域的主要污染源,尤其在太湖流域农业非点源污染日益受到关注.本文从农村生活污水、畜禽养殖废弃物、农田径流3个农业非点源核算2010年太湖流域COD、
The FloripaSat-Ⅰ project consists of an initiative from the Federal University of Santa Catarina(UFSC), in Brazil, to train students to design, test and integrate innovative space systems.The group ju
1983年因大气环流明显异常,引起气候多变,自然灾害频繁,不少气候要素失去常年规律,两极分化极其明显。如4月的高温酷热多大风,5—8月的连续少雨干旱,三秋时节的烂冬雨以及12
With the development of unconventional oil and gas exploration,the success of North American shale oil and gas exploration and development,domestic oil workers
84年春,浑源县城关乡当巷大队种菜能手吕喜,从大同市种子公司卖回0.5斤“8112“青椒籽,经过精心育苗,在前茬是玉米的新菜地里种了1.01亩,年终一结算,亩产达到10,150斤,产值
一、培育适龄壮苗选用“荷兰雪球”品种,苗龄为26～30天.菜花苗床地应就地就近选择,一般壤土、砂壤土均可,但必须能灌易排.7月1～5 日播种育苗.播种前施足优质农家肥,然后做成高