不同灌水模式下罂粟吗啡含量的变化

本文初步探讨了水分调控对罂粟不同生育时期地上主要器官吗啡含量的影响,实验结果表明,冬灌区现蕾期到盛花前期,随着灌水频率加大,罂粟壳中吗啡含量明显提高,盛花后期的连续灌水使罂粟壳中吗啡含量急剧下降,免冬灌区恰好相反,发育后期适当加大灌水频率和提高灌水量能明显的提高罂粟壳中的吗啡含量     

Optimization of multi-source UAV RS agro-monitoring schemes designed for field-scale crop phenotyping

Precision Agriculture - Unmanned aerial vehicle (UAV) system is an emerging remote sensing tool for profiling crop phenotypic characteristics, as it distinctly captures crop real-time information...     

对虾白斑综合症病毒变性高效液相色谱检测方法的建立与应用

据对虾白斑综合症病毒(WSSV)的基因保守序列,使用Primer Explorer V3软件设计了2条引物,利用PCR的扩增产物,结合变性高效液相色谱(DHPLC)技术,建立了一种对虾白斑综合症病毒的DHPLC快速检测方法。该检测方法特异性好,与传染性皮下和造血器官坏死病毒、斑节对虾杆状病毒、肝胰腺细小病毒、对虾杆状病毒以及对虾基因组DNA无交叉反应;检测灵敏度较高,约为10-5ng/μL,高于常规PCR及荧光定量PCR的灵敏度。用建立的DHPLC方法对100尾对虾样品进行了临床检测,结果与荧光定量PCR检测结果一致。WSSV的DHPLC检测方法,特异性强、灵敏度高,是对WSSV进行有效检测的一种新方法。     

土壤因子对海洋多粘类芽胞杆菌L_1-9在黄瓜根表土壤定殖的影响

本试验考察了土壤温度、有机质含量和pH对海洋生防细菌多粘类芽胞杆菌L_1-9在黄瓜根表土壤中定殖的影响。采用实时荧光定量PCR方法检测了不同时期黄瓜根表土壤中菌株L_1-9的16S r DNA拷贝数。结果表明,土壤有机质含量、土壤温度和pH对菌株L_1-9在黄瓜根表的定殖有显著影响(P0.01)。25℃定殖数量最高,为5.79×108拷贝/g土,是15℃时的3.4倍;添加有机肥20~40 g/kg土壤,可以促进菌株L_1-9在黄瓜根际定殖;pH 7时,菌株L_1-9在黄瓜根表土壤中的定殖数量最高。本研究为海洋生防菌L_1-9防治黄瓜土传病害提供了理论依据。     

河北省早中熟梨生产存在问题及对策

概述了河北省早中熟梨发展历程,分析了河北省当前早中熟梨生产中存在的主要问题,提出了相应的对策。     

Embryogenesis and plant regeneration from anther culture in loquat (Eriobotrya japonica L.)

The object of this study was to induce embryogenesis and establish plant regeneration system for anther culture in loquat (Eriobotrya japonica L.). Cold pretreatment was a key factor, and supplement of 2,4-D in the media was absolutely necessary for induction of calluses from cultured loquat anthers. The best response of anthers to in vitro culture was obtained when a 48-h cold pretreatment was employed to flower buds at 4 °C in darkness. Genotype was a decisive factor for embryo differentiation. When anther-derived calluses of three loquat cultivars, i.e., cv. ‘Longquan1’, ‘Dawuxing’ and ‘Zaozhong6’, were transferred to embryo differentiation medium, embryos were induced only for cv. ‘Dawuxing’ on MS medium containing 3% sucrose, 0.23 μM ZT in combination with 0.05 μM NAA + 0.05 μM IBA or 0.11 μM NAA + 0.10 μM IBA, and the differentiation rates were 3.33% and 10.00%, respectively. The results of histological studies showed that embryos developed through typical globular, heart, torpedo and cotyledon stages after 4 weeks of culture. The treatment designed to mature the embryos on medium containing 3% of sucrose at 4 °C under darkness for 4 weeks was effective for subsequent embryo germination and plant conversion, which gave rise to 72.5% plant recovery. Cytological studies showed that 26 plantlets were haploids (n = 17) and the remaining 4 plantlets were diploids for the 30 regenerants tested.     

胶州大白菜品牌运作见成效

胶州大白菜连续两年一棵卖50元,作为礼品菜每箱88～168元,究竟什么样的大白菜能值这么多钱,又是怎么种出来的,我们应该从中受到什么启示？     

葡萄黑痘病的识别与防治

本文介绍了葡萄黑痘病的识别方法及发病规律,并提出了防治对策.     

晋中市4种绿化植物健康评价

采用样方法,对晋中市香花槐(Robinia pseudoacacia‘idaho’)、新疆杨(Populus bolleana Lauche)、油松(Pinus tabuliformis)及国槐(Sophora japonica Linn.)等4种绿化植物的健康状况进行了评价。结果表明,4.4%的香花槐生长较差,6.7%生长一般,86.6%基本健康,2.2%生长健康;3.8%的新疆杨生长差,6.5%生长一般,89.6%基本健康;1.8%的油松生长差,7.4%生长势一般,87.0%基本健康,3.7%生长健康;93.8%的国槐基本健康,仅有6.2%生长一般。从调查数据可以看出,4种绿化植物大部分基本健康,仅存在轻微的问题,说明晋中市绿化植物养护管理较好。