| 引用本文: | 李 静,张富仓,江明杰,等.水氮供应对温室黄瓜氮素吸收及土壤硝态氮分布的影响[J].灌溉排水学报,2017,36(3):. |
| LI Jing,ZHANG Fucang,JIANG Mingjie,et al.水氮供应对温室黄瓜氮素吸收及土壤硝态氮分布的影响[J].灌溉排水学报,2017,36(3):. |
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| 摘要: |
| 采用温室小区试验，研究了不同水氮供应条件对温室黄瓜氮素吸收及土壤硝态氮分布的影响。结果表明，氮素在植株体各器官中的累积量随生育期的推进不断增大，在盛果期累积量达到最大，且总体增长趋势呈“S”型；在不同生育期，黄瓜各器官中氮累积量均表现为叶＞茎＞根，而在盛果期，果实中的氮累积量达到最大，且随灌水量和施肥量的增加而增加；灌水量、施氮量及水氮交互作用对黄瓜氮累积量、UPE及PFP均有显著性影响，在同一灌水条件下，NUE、UPE及PFP均随着施氮量的增加而减少，而对于同一施氮水平，UPE、PFP均随着灌水量的增加显著提高，NUE在不同灌水量条件下变化趋势则有所不同。灌水量及施氮量对土壤硝态氮分布有重要影响，且施氮量是影响土壤硝态氮累积的关键因素，随灌水量的增加表层土壤中硝态氮累积量呈逐渐降低的趋势，而随施氮量的增加则逐渐增大，且施氮量越高，淋洗现象越明显。 |
| 关键词: 温室黄瓜； 水氮供应； 滴灌施肥； 氮素吸收； 硝态氮 |
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| Effects of Water and Nitrogen Supply on Nitrogen Uptake of Greenhouse Cucumber and Nitrate Nitrogen Distribution in Soil |
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LI Jing, ZHANG Fucang, JIANG Mingjie, FANG Dongping, WANG Haidong
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Shaanxi Land Construction Group, Xi ’an 710075, China; Northwest A&F University, Yangling 712100, China; Shaanxi Dong Jia M&E Installation Co., LTD, Xi ’an 710075, China; Zhejiang Design Institute of Water Conservancy and Hydroelectric Power , Hangzhou 310002, China
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| Abstract: |
| The greenhouse experiment was conducted to study the effects of different water and nitrogen supply on nitrogen uptake of greenhouse cucumber and nitrate nitrogen distribution in soil. The results showed that nitrogen accumulation in various organs of cucumber increased with the growth stage advancing, and gained the maximum amount of accumulation in full fruit period. In addition, the overall growth trend presented "S" type; In different growth periods, nitrogen accumulation in various organs of cucumber showed that: leaf> stem> root, while nitrogen accumulation in fruit reached the max value during the fruiting period, and increased with the increase of the irrigation and fertilizer amount; Irrigation, nitrogen rate and water and nitrogen interaction had significant influence on nitrogen accumulation, UPE and PFP of cucumber. Under the same irrigation conditions, NUE, UPE and PFP presented a decreasing trend with the increasing amount of nitrogen. For the same nitrogen levels, UPE and PFP significantly increased with the increase of irrigation, but the trend of NUE varies under the different irrigation conditions. Irrigation and nitrogen rate had a major impact on soil nitrate distribution, and nitrogen rate was the key factor of affecting soil nitrate accumulation. With the increase of irrigation amount, nitrate content in surface soil was gradually decreased, while increased with the increase of nitrogen rate, and the higher nitrogen amount caused the leaching phenomenon more evidently. |
| Key words: greenhouse cucumber; water and nitrogen supply; fertigation; nitrogen uptake; nitrate nitrogen. |
