摘要
大白菜单株矿质元素的吸收量与生长量并进,出苗后30天吸收量猛增,70天后增长幅度逐渐变小。每生产1000kg鲜菜约需纯氮1.816kg,纯磷0.362kg,纯钾2.834kg,纯钙1.61kg,纯镁0.214kg。大白菜对微量元素的吸收量以铁最多,锌、硼、锰较少,铜最少。莲座叶内氮、钾含量随叶龄增大而减少,钙的含量则随叶龄的增大而增加,磷、镁变化不大。各种矿质元素在不同叶位以及同叶位的中肋和软叶中的分配均有所不同。并据该研究结果初步确定了大白菜叶分析的采样时期和部位。
The law of absorption and distribution of mineral nutrient elements in leaves of Chinese cabbage were studied. The results indicated that the mineral nutrient element content in plant increased with plant growth, it increased rapidly 30 days after seedling coming out, the extent of increase decreased 70 days after seedling coming out. Product of 1000 kg fresh weight needed about N 1. 816 kg, P 0. 362 kg, K 2. 834 kg, Ca 1. 61 kg, Mg 0. 214 kg, Fe 20. 84 g, Zn 2. 21 g, Cu 0. 19g, B 1. 87g, Mn 1. 41g. The content of N and K in rossette leaves dropped with the increase of leaf age, while the content of Ca increased gradually with the increase of leaf age. The distribution of mineral nutrient elements was different in different leaf position, main leaf veins and soft leaves. The sampling period and location for leaf-analysis of Chinese cabbage were determined preliminarily according to the results.
出处
《园艺学报》
CAS
CSCD
北大核心
1993年第2期150-154,共5页
Acta Horticulturae Sinica
关键词
大白菜
矿质营养
叶位
吸收
分配
Chinese cabbage
Mineral nutrition
Leaf position
