Enzymatic treatment to enhance carotenoid content in dehydrated marigold flower meal

The effect of enzymatic treatments using a commercial enzyme (Econase-cep at pH 5.0 and 0.1% w/w concentration) at different levels of dehydrated marigold meal (5, 10, 15 and 20% dry weight), to enhance carotenoid extraction, was evaluated. The AOAC method consisting of a simultaneous extraction and saponification by using hexane-ethanol-acetonetoluene (10:6:7:7 v/v) and metanolic KOH (40% w/v) was used to evaluate the carotenoid content. The measurement of carotenoids was also carried out in samples in which the water soluble compounds were previously eliminated (AOAC-H₂O). Total carotenoids ranged from 11.4 to 17. 4 g/kg and 18 to 24.7 g/kg of control and treated marigold meal, respectively. Highest amount of carotenoids were noted when 5% level of treated meal was used.     

甜菜属近缘三种间杂交后代分离的观察

本文报道了甜菜属Vugares组中B.patula Ait.、B.cicla L.Tyrkey、B.cicla L.China、B.vulgaris L.三个物种间三个组合杂交后代的分离情况。三个组合间F_2、F_3具有相似的分离情况,说明B.Patula及B.cicla正反交中核构成是一致的,染色体基本上是同源的。一年生生长习性及野生种根型表现为显性,F_2服从孟德尔分离,但有的表现偏离。三个组合F_2、F_3的花粉育性、株型等表现具有广泛的方离,从中可分离出极少量高糖、高抗病等各种有益材料。     

Growth models for Pinus patula in Angola

This study developed growth models for Pinus patula Schiede ex Schltdl. et Cham. for the Central Highlands of Angola for simulating the development of stand characteristics. The model set included dominant height, individual-tree diameter increment, individual-tree height and self-thinning models. The study was based on 7 656 radial increment observations obtained from increment cores from eight plots located in five sites in the Angolan Highlands. The model set enables the simulation of stand development on an individual tree basis. Despite the fact that site variation among the plots was small, a traditional site category index based on slope catena correlated logically with the observed diameter growth rate of the plots. The developed models showed a high level of accuracy when the simulated stand development was compared to observed development. The shape of the dominant height model is similar to earlier models developed in southern Africa.     

不同AM菌剂配比对万寿菊幼苗生长特性的影响

为了解AM菌剂对万寿菊幼苗生长的调控效果,在育苗基质中分别加入3种不同配比的AM菌剂配制成菌肥基质,研究不同菌肥基质对万寿菊栽培苗生长性状、始花期及叶绿素含量等的影响。结果表明,添加AM菌剂后,万寿菊幼苗的苗高、地径、鲜重、干重、叶绿素含量等指标得到一定提高。幼套球囊霉(Glomus etunicatum)和摩西球囊霉(Glomus mossea)混施处理效果最好,其幼苗鲜重与干重的冠根比降低,根系发育良好,始花期提前,在生产中可作为有效的万寿菊育苗菌剂配方。     

太红1号孔雀草选育研究初报

太红1号孔雀草是采用太空诱变育种方法,结合地面常规选育技术的植物育种新途径,经过近5年的研究培育而成的国内首个具自主知识产权,变异性状突出、花大色艳、花期长、花朵数量多、综合性状好、适应性强、市场认可等特点的孑L雀草太空优良变异新品种。     

不同授粉次数和环境条件对金盏花结实率的影响

在春秋大棚进行金盏花杂交授粉试验,探讨不同授粉次数和环境条件对金盏花结实率的影响。结果表明,实施2次和3次授粉均能获得较高的结实率,其中又以隔天授粉3次的结实率最高;当日均温在21．9—31．7℃之间,每日11：00—16：00的相对湿度维持在37％左右,光照强度在40744～71022lx之间时,可以获得较好的授粉结实率。但气温、湿度和光照强度等环境条件对金盏花结实率的影响幅度仍需进一步研究。     

秸秆作孔雀草栽培基质的适应性研究

以几种常见的农作物秸秆(稻草、香蕉干、玉米秆)和香根草秸秆为基质材料,并以泥炭土为对照进行孔雀草的盆栽试验。探讨了不同处理的秸秆作为孔雀草栽培基质的适应性。结果表明:新鲜香根草秸秆适合直接作孔雀草的栽培基质,新鲜玉米秆、香蕉干和稻草不适合直接作孔雀草的栽培基质,需堆沤处理后才有较好的栽培效果;堆沤后的玉米秆较适合作栽培基质,栽培效果比对照好;堆沤后的玉米秆、稻草和香蕉干与进口泥炭土(1∶1)混合后均适合作栽培基质,且栽培效果比单一秸秆基质好。     

宁夏地区万寿菊生产操作规程

万寿菊是宁夏室外绿化主要品种之一。通过多年的科研和生产实践,总结出了宁夏地区万寿菊基本的生产技术操作规程,为宁夏万寿菊的生产培育提供技术支持。     

水氮耦合对金盏花产量和叶黄素含量变化的影响

【目的】探索甘肃河西地区金盏花栽培最佳的水氮施用量,旨在提高金盏花产量与叶黄素含量。【方法】2009～2010年在垄作沟灌条件下,以节水栽培品种NK08-5为材料,进行不同灌水量和施氮量组合的田间试验。【结果】灌水3600m3/ha与施N270kg/ha组合处理的产量最高,较灌水4200m3/ha与施N和灌水4200m3/ha与施N90kg/ha处理的产量差异达显著水平,灌水3600m3/ha与施N90kg/ha和灌水3000m3/ha与270kg/ha处理的叶黄素含量最高均为11.7%。【结论】金盏花垄作沟灌有明显的水氮耦合效应,品种NK08-5最佳的水氮施用量组合为灌水3600m3/ha与施N90kg/ha。     

万寿菊花粉活力及柱头可授性研究

为探明造成万寿菊雄性不育系结实率低的原因,对万寿菊花粉活力及柱头可授性进行了研究。采用花粉离体萌发法研究万寿菊自交系V-01花粉萌发适宜温度、花粉活力日变化和适宜贮存条件;用联苯胺-过氧化氢法检测万寿菊雄性不育系S-261、S-17-06-29、S-0191不育株柱头的可授性;水溶性苯胺蓝染色法检测花粉在柱头的萌发情况。结果表明：（1）万寿菊V-01适宜萌发温度介于25~30℃之间;V-01花粉活力日变化趋势为先升高后降低,11-13时采集的花粉萌发率最高;4℃干燥贮存是最适宜的花粉贮存条件。（2）万寿菊柱头形态呈‘γ’状时有可授性,可授性可持续3天。（3）万寿菊花粉授粉到柱头上1 h内即可萌发,授粉后2 h,花粉细胞达到花粉管内。