| 摘要: |
| 【目的】研究灌水量和氮、磷、钾肥用量对番茄果实硝酸盐含量的影响，为番茄的优质生产提供依据。【方法】以“金鹏1号”番茄为试验材料，采用四元二次正交旋转组合设计和盆栽试验，通过回归拟合，建立番茄果实硝酸盐含量与灌水量及氮、磷、钾肥用量因子间的回归模型，并对各单一因素及两因素的耦合效应进行分析。【结果】当其他因子为中间水平时，番茄果实硝酸盐含量随灌水量、施钾量的增加呈先增后降的趋势，与施氮量和施磷量均呈正相关关系，且施氮量的增幅大于施磷量。灌水量与施钾量、施氮量与施磷量间的交互作用为正效应，灌水量与施磷量、施氮量与施钾量间的交互作用为负效应。【结论】灌水量较低时，少施磷肥或合理配施钾肥能抑制硝酸盐累积；少施氮肥，增施磷肥或合理配施钾肥也是降低番茄果实中硝酸盐含量的有效措施。 |
| 关键词: 番茄 硝酸盐 灌水量 氮、磷及钾肥用量 四元二次正交旋转组合设计 |
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| 基金项目:国家自然科学基金项目（51279169）;国家“863”计划项目（2011AA100504） |
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| Effects of water and fertilizer supply on nitrate content in tomato fruit |
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NIU Xiaoli, HU Tiantian, ZHOU Zhenjiang，et al
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Northwest A&F University
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| Abstract: |
| 【Objective】The effects of irrigation amounts and fertilizer rates of nitrogen,phosphorus and potassium on nitrate content in tomato were investigated to improve the production of high quality tomato.【Method】“Jinpeng 1” was used as experimental material.Using a pot experiment and quadratic orthogonal regressive rotation design with four factors,a regression model of water and fertilizer mounts and nitrate content in tomato was established.Single and coupling effects of all four experimental factors were studied.【Result】If other factors were zero codes,nitrate content increased at first and then eventually reduced as the increase of irrigation amount and or K fertilize rate while the nitrate contents constantly increased as the increase of P and N fertilizer rate.The interactions between irrigation amounts and K fertilizer rates and between N and P fertilizer rates were positive,while the interactions were negative between irrigation amounts and P fertilizer rates and between N and K fertilizer rates.【Conclusion】It was indicated that nitrate content in low irrigation amount decreased when reducing P or with reasonable K fertilizer rate.It was effective to increase nitrate content in tomato by adding P or with reasonable K when N fertilizer rate was reduced. |
| Key words: tomato nitrate content irrigation amount fertilizer rates of nitrogen,phosphorus,and potassium quadratic orthogonal regressive rotation design with four factors |
