氮磷对陇东地区菘蓝生长和产量影响

Effect of Nitrogen and Phosphorus on Growth and Yield of Isatis indigotica Fort in Eastern Gansu Province

以菘蓝为材料,研究不同氮磷处理对陇东地区菘蓝生长和产量的影响,以期获得最佳的氮磷施肥量。结果表明:各处理中菘蓝的叶长、叶宽和叶片数在整个生育期均呈现"先增加后减小,再第二次增加"的变化趋势,菘蓝根长和根粗呈现出"先快后慢逐渐增长"的趋势。处理二的叶长和根长最长,分别为33.6 cm和24.4 cm,处理五的叶宽、叶片数和根粗最大,分别为8.6 cm、21.2个和2.16 cm。方差分析表明:除处理二与处理五小区生物产量无差异外,处理二的叶产量和小区生物产量,处理五的根产量为最大,与其他各处理具有显著的差异。处理二的叶产量和小区生物产量分别为0.112 kg和16.77 kg,处理五的根产量为0.056 kg。综合考虑叶和根部产量2个方面,处理五为最佳氮磷施肥量。

To get the optimum nitrogen and phosphorus fertilizer application rate, the author studied the effect of different treatments of nitrogen and phosphorus on the growth and yield of Isatis indigotica Fort in eastern Gansu Province. The results showed that the leaf length, leaf width and leaf number exhibited the trend of ＂increase--decrease--increase＂, root length and root diameter exhibited a ＂fast--slow＂ gradually increase trend. Leaf length and root length of treatment two were the highest of 33.6 cm and 24.4 cm, respectively, leaf width, leaf number and root diameter of treatment five were the largest of 8.6 cm, 21.2 and 2.16 cm, respectively. Variance analysis showed that the biological yield of treatment two and treatment five had no difference, leaf yield and biological yield of treatment two and root output of treatment five were the largest, and had significant difference compared with other treatment. The leaf yield and biological yield of treatment two were 0.112 kg and 16.77 kg, respectively, the root output of treatment five was 0.056 kg. According to the yield of leaf and root, treatment five was the best nitrogen and phosphorus application rate.