关键词: 梁山慈竹, 养分施入模式, 响应特征

Abstract: [Objective] The objective of this study was to reveal the effect of nutrient application mode on the growth characteristics of D. farinosus, which can apply scientific bases for establishing the rational soil nutrition management techniques. [Method] The orthogonal experiment was carried out base on the three main factors including nutrient application ratio, quantity and methods with three levels. [Results] The results indicated that growth characteristics, including new bamboo, diameter at breast height(DBH), the biomass of new bamboo, reproductive rate, showed inconsistently response to different nutrient application modes. The DBH, biomass, reproductive rate of new bamboo were affected significantly by the nutrients application methods. The DBH of new bamboo of D. farinosus increased significantly by perforated method, while the biomass and the reproductive rate of new bamboo increased significantly by broadcast fertilizer. What's more, the DBH of new bamboo and reproductive rate increased significantly by the nutrients application amount of 0.6 kg per clump. The growth indexes didn't significantly increase with the proportion of nutrients application. However, the growth indexes of D. farinosus largely increased when the ratio of nitrogen(N):phosphorus(P):potassium(K) was 5:2:1. [Conclusion] The below was the recommended mode of nutrients applied for different growth index of D. farinosus. The optimum mode for the DBH of new bamboo was that the nutrient application ratio of N:P:K was 3:2:1, the nutrient application amount was 0.6 kg per clump, the nutrient application method was perforated method. The optimum mode for the reproductive rate of D. farinosus was that the nutrient application ratio of N:P:K was 5:2:1, the nutrient application amount was 0.6 kg per clump, the nutrient application method was broadcast fertilizer. Moreover, the optimum mode for the biomass of new bamboo was that the ratio of N:P:K was 5:2:1, the nutrient application amount was 1.2 kg per clump, the nutrient application method was circling nutrients application.

Key words: Dendrocalamus farinosus, nutrient application modes, growth characteristics