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为了探讨毛竹Phyllostachys edulis爆发式生长与营养物质积累的关系,在毛竹爆发式生长期的4,5,6月中旬分别采集不同年龄(1,3,5年生)立竹器官(叶、枝、秆、鞭)样品,测定氮、磷、钾、钙和镁质量分数,分析不同年龄立竹间差异。结果表明:在毛竹爆发式生长期,相同年龄立竹叶、枝、秆、鞭中的养分质量分数存在差异,氮、磷、钾、钙和镁质量分数竹叶中最高,平均分别为23.18,2.51,12.28,4.08,和0.96 g·kg-1;竹鞭次之,竹秆中最低;氮、磷、钾质量分数竹叶4月较低,5月和6月较高,而在竹枝、竹秆、竹鞭中则是4月较高,5月和6月较低;不同年龄立竹相同器官的营养元素质量分数也存在差异,且不同营养元素的动态变化规律亦不相同。在显著水平为0.05的条件下,4月,叶、枝、秆中氮、磷、钾质量分数1年生立竹高于3年生和5年生立竹;5月,竹叶中钾质量分数随竹龄增加而减少,叶、鞭中氮质量分数1年生和3年生立竹显著高于5年生立竹;6月,竹叶中氮和磷质量分数1年生立竹显著低于3年生和5年生立竹,竹鞭中氮和磷质量分数1年生立竹显著高于3年生和5年生立竹;5-6月,不同年龄立竹叶、枝、秆中镁质量分数均差异不显著。研究表明:毛竹在爆发式生长期立竹器官营养物质存在明显的生理整合作用。
In order to explore the relationship between the explosive growth of Phyllostachys edulis and the accumulation of nutrients, the bamboo organ (leaves, branches and stems) with different ages (1, 3 and 5 years old) were collected in April, May and June in the explosive growth period of Phyllostachys pubescens. , Whip) samples, the determination of nitrogen, phosphorus, potassium, calcium and magnesium mass fraction, analysis of different ages stand bamboo difference. The results showed that there were differences in the nutrient contents of Phyllostachys pubescens leaves, branches, stems and whip at the same age in the explosive growth period of bamboo, and the highest contents of nitrogen, phosphorus, potassium, calcium and magnesium in the bamboo leaves were 23.18, The bamboo leaves were the second, and the bamboo leaves were the lowest. The contents of N, P and K were lower in April and higher in May and June, Bamboo stalks and bamboo whips were higher in April and lower in May and June. There were also differences in the nutrient contents of the same organs at different ages, and the dynamic changes of different nutrients were also different. Under the condition of the significant level of 0.05, the percentage of 1-year-old standing bamboo in April, leaves, branches and stalks was higher than those of 3-year-old and 5-year-old. In May, In the leaves and whip, the nitrogen content of 1-year-old and 3-year-old bamboo was significantly higher than that of 5-year-old bamboo. In June, the bamboo and 1-year-old bamboo with nitrogen and phosphorus contents were significantly lower than the 3-year and 5-year-old The bamboo and bamboo whip larvae of nitrogen and phosphorus content of 1-year-old bamboo was significantly higher than the 3-year-old and 5-year-old bamboo; from May to June, different ages Li bamboo leaves, branches and stems of magnesium content was not significantly different. Studies have shown that: bamboo in the explosive growth of bamboo organic nutrients there is a clear physiological integration.