生物有机肥对番茄生长发育及产量品质的影响

以144番茄为试材,研究了酵素菌生物有机肥对番茄生长发育及产量品质的影响。结果表明,生物有机肥与化肥配施可显著促进番茄植株的生长,提高产量,同时,亦可改善果实营养品质与风味,尤其可显著增加果实的番茄红素含量,降低果实硝酸盐含量。单施生物有机肥及生物有机肥与化肥配施的番茄产量分别达5463·7和5937.8kg·(667m2)-1,分别比单施化肥增产7.2%和16.5%,纯收入增加8.0%和11.3%。     

刈割时期对光叶紫花苕生产性能的影响

对不同刈割时期(播种后60d、90d、105d、120d和135d)的光叶紫花苕生产性能进行了比较研究,结果表明:光叶紫花苕在播种后105d刈割利用1次可获得较高的效益,产草量高达18000.15kg/hm2,种子产量高达964.5kg/hm2,比播种后90d刈割产草量提高了16.13%,种子产量提高13.8%,比对照种子产量提高71.9%。     

圆叶海棠无糖培养生根研究

为了探索新的砧木快速繁殖的方法,以圆叶海棠离体新梢为供试材料,采用自行设计的无糖培养箱和环境控制系统,进行无糖培养生根研究,比较无糖培养与有糖培养海棠离体新梢光合指标和根系形态指标之间的差异。结果表明:增加光照强度和提高CO2浓度,改善了海棠离体新梢生长的环境条件;与有糖培养相比,无糖培养促进了植株的生长发育。主要表现在:植株健壮且根系发达,有大量的侧根形成;植株的根系活力、光合作用、调节气孔开闭和控制蒸腾速率等方面显著提高。无糖培养提高了海棠离体新梢对环境的适应能力。     

红Ji木嫩枝密闭扦插技术研究

从扦插时期、基质、ABT－1号不同浓度处理3个方面对红Ji木嫩枝密闭扦插进行研究，结果表明，扦插时期以夏季6－8月为最佳、基质以黄心土为最好、ABT－1以50mg/L为最佳，其最佳组合的扦插成活率可达96％。     

重瓣榆叶梅的绿枝扦插繁殖研究

重瓣榆叶梅(Prunus trilba var.plena Dipp.)是蔷薇科李亚属中的一种落叶花灌木。它具有开花早、花期长、花朵大、颜色纯正鲜艳等特点,是一种观赏价值很高的园林绿化、彩化树种。由于它雌雄蕊退化,不能正常结实,无法用种子实生繁殖,常规的扦插繁殖,成活率极低,无实用价值。在生产上,只能用分株和嫁接方法进行繁殖,但费工费时且繁殖效率很低,使重瓣榆叶梅的苗木生产受到限制。为此,作者自1984年开始进行绿枝扦插试验。 材料与方法 一、材料 插条的采剪。于6—7月,在苗圃内,剪取树龄2—4年生     

除草醚在樟子松沙地育苗中的应用

除草醚用于樟子松沙地育苗的芽前除草是完全有效的,最佳施药量为1.1g/m2,为人工除草费用的14.6%.喷施法药剂着药均匀,为最佳施用方法,剂量为1.1～2.3g/m2时,除草率可达99.23%.     

蕨菜叶绿素含量及呼吸酶活性的变化规律研究

经过对蕨菜（孢子体）不同生育阶段的地上部植株叶片的叶绿素含量、呼吸酶活性及地上部生长量变化规律的研究表明：（１）不同生育阶段的叶绿素α、叶绿素ｂ存在明显的差异;（２）不同生育阶段的过氧化氢酶活性、过氧化物酶活性呈下降的趋势。（３）不同生育阶段的地上部鲜重、干重、干重／鲜重呈增长趋势,含水量呈下降的趋势。     

野生药用植物—酸枣生物学特性及繁殖技术研究初报

本文报道了酸枣的分布生境、生长开花、繁殖生物学和生态学特性及引种栽培试验的初步结果。探讨了人工扩大栽培的可能性强的耐寒提出了酸枣开发利用的前景。     

Relationships between mass mortality of two oak species (Quercus mongolica Turcz. var.grosseserrata Rehd. et Wils. andQ. serrata Thunb.) and infestation by and reproduction ofPlatypus quercivorus (Murayama) (coleoptera: Platypodidae)

This study investigated the number of adults ofPlatypus quercivorus (Murayama) captured on host oak (Quercus spp.) trees, the attack density (the number of entry holes per 100 cm²), and the number of emerging adults to clarify the relationships between the beetle’s colonization on trees in oak stands and tree mortality. The initial attack ofP. quercivorus, which was the most intense attack, was observed on most living trees simultaneously. Although some attacked trees died within the year of the attack or in the next year, a high density of attack did not usually cause the death of host trees. Surviving trees suffered low levels of consecutive attack after the initial attack. BecauseP. quercivorus successfully produced broods only in the dead trees, the population of the insect seems to be maintained only in stands where oak mortality occurs. However, the adults that landed on most of the surviving trees appeared unable to reproduce probably due to degradation of host quality. Thus, oak mortality probably ceases within 3 or 4 years after the start of infestation in a stand, with subsequent reductions in population density of the borer.     

An extended random primer amplified region (ERPAR) marker linked to a dominant male sterility gene in cabbage (Brassica oleracea var. capitata)

Similar to SCAR, an extended random primer amplified region (ERPAR) marker is a PCR amplified genomic DNA fragment at a single genetically defined locus. However, ERPAR uses specific primer pairs derived from RAPD primers by adding bases sequentially to their 3′-ends. As an example, an ERPAR marker was derived from a RAPD marker (OT11₉₀₀) linked to a dominant male sterility gene in cabbage (Brassica oleracea var. capitata). After two cycles of base adding and primer pair screening, a primer pair (5′-TTCCCCGCGACT-3′and 5′-TTCCCCGCGAGA-3′) amplified a single intense band with the same size as OT11₉₀₀. The identity of the new marker and OT11₉₀₀ was verified by segregation analysis. The new marker amplified by this extended primer pair was named as EPT11₉₀₀. The development of ERPAR exploits the importance of 3′-end bases of primers in PCR ERPAR shares advantages of SCAR, but eliminates the need for cloning and sequencing. It is a fast and universal way of converting RAPD markers into stable markers. This revised version was published online in July 2006 with corrections to the Cover Date.