| 氮、磷、钾缺素培养对沙田柚幼苗生长的影响 |
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| 引用本文： | 蔡金凤,李威娜,许良政.氮、磷、钾缺素培养对沙田柚幼苗生长的影响[J].嘉应学院学报,2013(11):66-70. |
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| 作者姓名： | 蔡金凤 李威娜 许良政 |
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| 作者单位： | 嘉应学院生命科学学院,广东梅州514015 |
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| 基金项目： | 广东省科技计划项目资助（2012A020602067） |
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| 摘 要： | 在室内溶液培养条件下,以沙田柚幼苗为材料,研究了缺N、P、K处理对沙田柚幼苗生长的影响.结果表明:N、P、K缺素处理后沙田柚幼苗的症状出现的时间在28d到43d之间,各种缺素症状出现的部位和表现都不相同.其中缺N处理在培养28d就开始出现全株淡绿色和叶片数少的现象;缺P处理在培养第37d开始出现全株暗绿和叶片数少的现象;而缺K处理在第43d才出现叶片细小钩状,叶缘和叶尖部分出现小坏斑的症状.对沙田柚幼苗嫩老叶叶绿素含量和根的影响最大的都是缺N处理,缺N处理的幼苗老叶和嫩叶叶绿素含量分别只占对照组含量的39.25%和30.18%;生物量受影响程度最大的是缺P处理;新叶生长受影响最大是缺N、P处理后的幼苗,该处理平均只长出了两片新叶.上述不同必需大量矿质元素缺素症的表现特征和规律,可为沙田柚生产中的营养诊断与合理施肥提供依据和指导.
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| 关 键 词： | 沙田柚 氮 磷 钾 缺素症状 养分管理 |
Influence of N,P,K deficiency on Growth of Citrus grandis Seedling |
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| Institution: | CAI Jin - feng, LI Wei - na , XU Liang - zheng ( School of Life Science, Jiaying University, Meizhou 514015, China) |
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| Abstract: | The effects of N,P,K deficiency on growth of pomelo（ Citrus grandis） seedling were studied in solution culture,and the morphological character,growth,biomass,root activity,Chloro- Phyll Chlorophyll content of the plant were observed. The results showed that： the time when the lack of N,P,K in the growth of pomelo seedlings are subject to a different extent; treatment of various deficiency diseases in seedlings of the time symptom appear between 28 to 43d,in which the parts and performance are not all the same,and in which N deficiency in the train- ing 28d are the began to appear a single light green leaves and fewer phenomenon; lack of P in the training 37d be- gan on the tree and the dull- green fewer phenomenon; and the lack of K to 43 days just appear on blades pointed and tiny hooked,a small tip part of bad spot symptom. On the chlorophyll content of new and old leaves,the grea- test impact was the loss of N treatment,which are the chlorophyll content of only 39. 25% and 30. 18% of the con- trol. The effect of ratio of root / shoot was the greatest for phosphorus deficiency plants; in phosphorus and nitrogen deficiency,the seedling growth of new leaves are most affected,for an average of just two sprouting new leaves; The slowest growth of the stem is the lack of N,while root growth is the lack of the slowest K deficiency plants. To diagnose and fertilize conveniently,we can make the retrieval table of element deficiency symptom of pomelo ac- cording to these specificity and regularity. |
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| Keywords: | Citrus grandis Osbeck cv Shatian nitrogen phosphorus potassium nutrient deficiency symptom nutrient management |
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