IAA、NAA和B对菊花扦插苗素质的影响

本实验研究了IAA、NAA和B对菊花扦插苗素质的影响，结果表明：用IAA、NAA和B三种混合溶液处理菊花插穗的生根数、根系长度，根系活力等均有不同程度变,插穗的地上部分与地下部分生长也显示出一定的差异。其中用三种混合溶液处理插穗生根最好，IAA、NAA效果次之，单独使用硼对插穗生根影响不大。     

Ｌu草粉锔喂生长育肥猪试验

草又名拉拉秧 ,属桑科鲜生草本植物 ,常生长在山沟、路旁、田边、地头及树林间。适应性强 ,生长快 ,多年来一直被认为是有害杂草 ,没被开发利用。经测定 5～ 9月份草干物质中的养分含量分别为 :消化能 2 .2 6～ 1 2 .3ＭＪ/ｋｇ ,粗蛋白质1 2 .8%～ 1 9.1 % ,粗纤维 1 5.4%～ 2 3.2 % ,粗灰分 7.1 %～ 9.8% ,无氮浸出物 33.4%～ 41 .8% ,钙 0 .84%～ 1 .46% ,磷 0 .2 6%～ 0 .32 %。据化验分析 ,草中含有木犀草素、葡萄糖甙、胆碱及天门冬酰胺和挥发性油、鞣质及树脂多种物质。50 %草乙醇浸液对福氏痢疾杆菌有抑制作用 ,草果对结…     

大棚沙培小型春西瓜病虫害综合防治技术

大棚沙培小型春西瓜一般采用立架或吊蔓方式栽培,种植密度较大,一般亩种植1400～1600株;而且覆盖塑料薄膜的棚室内空气湿度高,温度变幅大,通风不良,光照弱;同时,营养液在栽培沙中可移动范围较大,病原菌与根部接触的机会较多.     

GIS在生态土地分类中的作用

This paper depicted the physiographic landscape features and natural vegetation situation of study area (the eastern Jilin Province), and expatiates the definition, basic characters and its development of Ecological Land Classification (ELC). Based on the combination of relief map, satellite photography for study area and vegetation inventory data of 480 sample sites, a 5-class and a 15-class ecological land type map was concluded according to 4 important factors including slope, aspect, vegetation and elevation. Ecological Classification System (ECS) is a method to identify, characterize, and map ecosystems. The Ecological Land Type (ELT) was examined and applied initially in eastern Jilin Province. Foundation item: This paper was supported by Chinese Academy of Sciences “100 people” project and the Open Research Station of Changbai Mountain Forest Ecosystem. Biography: XIAO Bao-ying (1974-), female, postgraduate in Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, P. R. China Responsible editor: Zhu Hong