手拉葫芦

使用农药残留速测仪检测西葫芦中农药残留的实验操作步骤可以根据具体的仪器型号和品牌有所不同，但以下是一般的操作步骤作为参考：注意：在进行任何实验操作之前，请确保您已经熟悉并遵守实验室安全规则和操作指南。材料和设备：西葫芦样品农药残留速测仪试剂盒（与仪器兼容的农药检测试剂）实验室用具（量筒、移液器、试管等）

参考NYT3012-2016咖啡及制品中葫芦巴碱的高效液相色谱测定方法，采用TSKgel Amide-80HR（5um,4.6mmID× 25cm）色谱柱对咖啡提取液中的葫芦巴碱进行分析，在色谱柱上有较强的保留并与其他提取成分色谱峰有很好的分离，完全可以满足标准中的分析测定要求。

Inadequate oxygen concentration in the root zone is a constraint to plant performance particularly in heavy, compacted and/or saline soils. Sub-surface drip irrigation (SDI) offers a means of increasingoxygen to plant roots in such soils, provided irrigation water can be hyper-aerated or oxygenated. Hydrogen peroxide (HP) at the rate of 5 litre ha-1 at the end of each irrigation cycle was injectedthrough SDI tape to a field-grown zucchini (courgette) crop (Cucurbita pepo) on a saturated heavy clay soil in Queensland, Australia. Fruit yield, number and shoot weight increased by 25%, 29% and 24% respectively due to HP treatment compared to the control. Two pot experiments with vegetable soybean (Glycine max) and cotton (Gossypium hirsutum) compared the effectiveness of HP and air injection using a MazzeiTM air injector (a venturi), throughout the irrigation cycle in raising crop yield in a heavy clay soil kept at saturation or just under field capacity. Fresh pod yield of vegetable soybean increased by 82-96% in aeration treatments compared with the control. The yield increase was associatedwith more pods per plant and greater mean pod weight. Significantly higher above ground biomass and light interception were evident with aeration, irrespective of soil water treatment. Similarly cottonlint yield increased by 14-28% in aeration treatments compared with the control. The higher lint yield was associated with more squares and bolls per plant which accompanied greater above ground biomassand an increase in root mass, root length and soil respiration. Air injection and HP effected greater water use, but also brought about an enhancement of water use efficiency (WUE) for pod and lintyield, and increased leaf photosynthetic rate in both species but had no effect on transpiration rate and stomatal conductance per unit leaf area.