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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
In this paper, the effects of different environmental factors (temperature, CO2, moisture, fertilization, etc.) on the growth and development and the potassium enrichment of grain amaranth were studied by single factor experiments. The results showed as follows: (1) During the growth period of grain amaranth, amaranth was planted on July 12 and February 22 with the average daily temperature of 2 6.9-2.26 ℃, and the corresponding plant potassium The highest volume. (2) When the concentration of carbon dioxide in the atmosphere reached 10 0 0 μl / L, the average plant height, the average fresh weight per plant and the average potassium content (K2 O) of amaranth were significantly higher than those of the control. (3) The soil moisture condition is most suitable for the growth of grain amaranth with field water holding capacity, but lower than the field water holding capacity will affect the plant potassium absorption. (4) Grain amaranth belongs to the type of plant with strong potassium absorption ability in potassium and potassium deficient soil. The application of potassium fertilizer is beneficial to increase the potassium content of grain amaranth