不同播期和环境条件对籽粒苋生长及富钾能力的影响

本文通过单因素试验 ,研究了不同环境因素 (温度、CO2 、水分、施肥等 )对籽粒苋生长发育及其富钾能力的影响。研究结果表明 :(1)籽粒苋在籽粒苋生长期内 ,以 7月 12日和 2 2日播种的籽粒苋 (日均温为 2 6.9～ 2 6.2℃ )生长最好 ,相应的植株含钾量也最高。 (2 )当大气中的二氧化碳浓度达到 10 0 0 μl/L时 ,籽粒苋的平均株高、单株平均鲜重和植株平均含钾量 (K2 O)较对照均有显著增加。 (3 )土壤水分条件以田间持水量对籽粒苋生长最为合适 ,低于田间持水量则影响植株对钾的吸收。 (4 )籽粒苋属于在多钾、缺钾土壤上 ,吸钾能力强的植物类型 ,施用钾肥有利于提高籽粒苋植株的含钾量

Effect of Different Seed Stage and Enviromental Conditions on Enrichment Capability for Potassium in Grain Amaranth

The growth of Grain amaranth and the enrichment capability for potassium in Grain amaranth were influenced by the enviromental conditions.The results of experement showed:(1)In growth period,the daily average air temperature influenced both the content of potassium and the biomass production.The daily average air temperature for the best growth and highest potassium content in Grain amaranth which was planted on 12th and 22nd of July was between 25.0 and 26.9℃. (2).When the concentration of CO 2 in the atmosphere reached 1000 μl/L , the Grain amaranth notably grew better and the content of Potassium was distinctly higher than at the concentration of 300μl/L.(3).Under the condition that the water in the soil reached the field moisture capacity, Grain amaranth grew best.(4). Grain amaranth belonged to the type of plant which had the strong capability of absorption of Potassium in the soil which was abundance in potassium or short in potassium.