Effects of Different Fertilization Modes on Soil Physico-chemical Properties and Bamboo Shoot Growth of Dendrocalamus giganteus Munro
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摘要: 以龙竹为试验材料,设置5个施肥处理,有机肥(A处理)、复合肥(B处理)、竹腔肥(C处理)、绿肥(D处理)、不施肥(CK处理),研究不同施肥模式对龙竹土壤理化性质及发笋成竹的影响。结果表明:施用复合肥和有机肥能显著提升土壤理化性质,与不施肥相比,有机肥显著提高土壤最大持水量、有机质、全氮、全磷和有效磷含量,而施用复合肥显著提高土壤最小持水量、全磷、全钾、有效磷和速效钾含量。竹腔肥和绿肥对土壤理化性质提升效果不明显,仅能显著影响土壤水解性氮、有效磷含量。施用复合肥、有机肥、竹腔肥都能显著提高新竹胸径,施用复合效果最明显,高于其他施肥模式。综上,结合对土壤理化性质提升效果、新竹平均胸径以及成竹率的综合考量,短期内施用复合肥对龙竹生长产生的效果最明显。Abstract: To study the effects of different fertilization modes on soil physico-chemical properties and bamboo shoot growth of Dendrocalamus giganteus, five fertilization treatments were performed, including organic fertilizer (A), compound fertilizer (B), bamboo cavity fertilizer (C), green fertilizer (D) and no fertilization (CK) as the control group. The results showed that the application of compound fertilizer and organic fertilizer significantly improved the soil physico-chemical properties. Compared with no fertilization, the application of organic fertilizer substantially increased the soil maximum water holding capacity and the contents of organic matter, total nitrogen, total phosphorus and available phosphorus. While the application of compound fertilizer significantly increased the soil minimum water holding capacity and the contents of total phosphorus, total potassium, available phosphorus and available potassium. Furthermore, bamboo cavity fertilizer and green fertilizer significantly affected the contents of soil hydrolytic nitrogen and available phosphorus, but had little impact on other soil physico-chemical properties. Applying compound fertilizer, organic fertilizer and bamboo cavity fertilizer evidently enhanced the diameter at breast height (DBH) of D. giganteus, and the compound fertilizer had the most notable effect. Therefore, by evaluating the improvement of soil physico-chemical properties, the average DBH of new culms and the survival rate of D. giganteus, it is concluded that the application of compound fertilizer in short-term has the most positive effects on the growth of D. giganteus.
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