Study on Cultural Technologies and Salt-resistance of Nitraria sibirica in Coastal Areas with Serious Salt-affected Soil

In this research, five Nitraria sibirica provenances such as Dayilu were selected to do experiment of salt-resistance, combining fixed plots test with typical plot investigation, measuring survival rate and growth as main indicators. The experiments of main cultural technology were done on Nitraria sibirica in 4 types of site preparation, 3 types of planting, 3 designs for planting density. The Nitraria sibirica experiments for the effects of curbing salt and improving soil were done by testing soil nutrients, salt content, soil physical properties as focal points in typical site of 3-4 years woods. The experiment results showed that the Nitraria sibirica could survive well with soil salt content of 0.6%, and that survival rate declined distinctively as soil salt content exceeded 0.8%. However, high soil salt content did not influence growth in the year of planting. There were obvious differences in salt-tolerance among Nitraria sibirica provenances; Dayilu was the best on salt-tolerance, the other 4 pro     

关于葡萄砧木资源的研究进展

葡萄属多年生落叶藤本植物,是葡萄科(Vitaceae)葡萄属(Vitis)植物,是地球上最古老的一种植物。据近代文献记载,葡萄多分布于温带至亚热带地区,葡萄属植物全世界约70种,我国约30种。其中仅有20多个种应用于生产果实和用作砧木,其它还处于野生状态,未被开发利用。1葡萄砧木的主要     

寄生蝇防治马尾松毛虫效果观察

马尾松毛虫（Dendrolimus punctans Walker）是我国森林最严重的常灾性害虫。笔者曾在郴州市郴县华塘镇松林35000亩大面积松毛虫灾区，主持以生物防治为主的松毛虫综合防治试验，成效显著。当时经多次调查成灾松林，见有大量松毛虫自然死亡的腐臭蛹尸，蛹尸内有寄生蝇幼虫，且现场寄生率很高，证实寄生蝇生物防治松毛虫有重大效果，成为一种不污染环境且效果显著而不花钱的天然控制虫灾的生物防治法，是对松毛虫综合防治极有前途的重要方法。     

内陆大水域的“高效、环保”施肥养鱼技术——科洋水产专用大水面专用肥

由于水库、湖泊等内陆水域水面广、容量大,不仅发挥着重要的蓄水、灌溉功能,而且具有广阔的渔业利用前景。近年来,为了改变粗放粗养模式下大水域养殖产量偏低、效益不高的现状,许多养殖单位和渔农在水库、湖泊等大水域中进行了施肥养鱼的有益尝试。生产实践证明,化肥养鱼成本低     

科杂一号的特征特性及育苗移栽技术

<正>科杂一号杂交抗虫棉是河北科润种业技术有限公司精选培育的超优杂交一代抗虫棉新品种,其杂交优势突出表现在高抗棉铃虫、高抗枯萎病、耐黄萎病、高抗重茬、铃大、产量高。1特征特性植株塔型,株高120厘米左右,属中早熟品种,生育期125天左右。出苗好,前期苗壮,长得快,现蕾早;中期生     

杏球坚蚧化学防治的研究

杏球坚蚧是我国“三北”地区重要的果树害虫，近来在我区蔓延很快，为害严重，影响果树长势，降低果品产量，重则使蛤树干枯而死。防治果树杏球坚蚧为害，已引起各级行政领导高度重视，成为广大作业科技工作者当务之急。经试验研究，喷施水胺硫磷，二嗪农，杀灭菊酯混合剂最好，     

长白山灵芝科种类及分布

长白山灵芝分布２属８种，松杉灵芝在长白山区数据较多。     

莫干山啮虫二新种((虫齿)目:(虫齿)亚目)

本文描述了(虫齿)科二新种,属(虫齿)目的(虫齿)科。模式标本保存于北京农业大学昆虫标本室。