利用Dualex植物叶绿素仪分析镁对马铃薯种薯发育和产量的影响

更新时间：2022-05-07　点击量：911

Dualex便携式智能气象-叶绿素-花青素-黄酮醇测量仪

摘要

马铃薯种薯生产系统可以改善马铃薯生产链。在有足够植物营养的盆栽或水培系统中种植可以提高种薯产量。在这些营养物质中，Ag（Mg）在植物的一系列代谢过程和生化反应中发挥作用，例如叶绿素的形成。因此，这种营养素的充足供应至关重要。本研究旨在评估两种栽培系统中镁剂量对植株形态特征和种薯产量的影响。两个实验同时在温室里进行。在实验I中，这些植物生长在有机基质的盆栽中。在实验II中，植物在水培系统中培养，并评估了五种剂量的镁。在这两个试验中，在21 DAE时评估的其他特征均未显示出对镁剂量的显著反应，除了第四片叶片干物质中的镁含量。在实验I和II中，提供最高种薯产量的剂量（单位为每株）分别为0.0 g dm3 MgSO4和0.96 mmol L1 Mg2þ。在这些剂量下，第四片叶片干物质中的镁含量分别为24.4和11.0 g kg1。在试验I中，对照组（不施用镁）的马铃薯种子产量最高，在试验II中，施用0.96 mmol L1的马铃薯种子产量最高。

Magnesium-influenced seed potato development and yield

ABSTRACT

Seed potato production in systems that provide higher amounts of planted material improves the potato production chain. Planting in a pot or hydroponic system with adequate plant nutrition may increase the seed potato yield. Among the nutrients, agnesium (Mg) has a role in a range of metabolic processes and biochemical reactions in plants, such as chlorophyll formation. Thus, the adequate supply of this nutrient is of fundamental importance. The study aimed to evaluate the effect of Mg dose on morphological characteristics of the plant and seed potato yield in two c*tion systems. Two experiments were installed simultaneously in a greenhouse. In experiment I, the plants were grown in a pot with organic substrate. In experiment II, the plants were c*ted in a hydroponic system, and five doses of Mg were evaluated. No other characteristics evaluated at 21 DAE showed significant response to Mg dose in both experiments, except for Mg content in the fourth leaf dry mass. The doses providing the highest seed potato yield, in units per plant, in experiments I and II were, respectively, 0.0 g dm3 of MgSO4 and 0.96 mmol L1 Mg2þ.At these doses, the Mg content in the fourth leaf dry mass were 24.4 and 11.0 g kg1 , respectively. The highest seed potato yield was obtained in the control (without Mg application) in experiment I and with the dose of 0.96 mmol L1 in experiment II.