| 引用本文: | 黄吴进,邓利梅,夏建国,等.温室滴灌施肥条件下土壤硝态氮的运移及分布特征[J].灌溉排水学报,2017,36(12):. |
| HUANG Wujin,DENG Limei,XIA Jianguo,et al.温室滴灌施肥条件下土壤硝态氮的运移及分布特征[J].灌溉排水学报,2017,36(12):. |
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| 摘要: |
| 为了揭示不同滴灌施肥方式对日光温室土壤硝态氮运移及分布的影响，以番茄为供试作物，选择漫灌为对照（CK），研究在3种施肥处理和4种灌水量条件下硝态氮的运移及在各土层的分布情况。结果表明，土壤硝态氮量随灌水量和施肥量的增加而增加，随土层深度的增加而逐渐减少。土壤硝态氮主要分布在0～40 cm土层，占试验土层总量的82%～92%。与大水高肥（W1F3）处理相比，节水节肥（W4F1）处理下土壤剖面硝态氮累积量减少了36.65%。与CK相比，节水节肥（W4F1）处理下40～60 cm土层硝态氮累积量减少了53.42%；与大水高肥（W1F3）处理相比，W4F1处理下40～60 cm土层硝态氮累积量减少了62.18%。在本试验条件下，较习惯施肥量减30%、灌水量减50%的处理是可行的，能够有效地提高氮肥利用率和产投比、降低土壤硝态氮的深层累积。 |
| 关键词: 温室； 滴灌施肥； 番茄； 硝态氮； 水分 |
| DOI：10.13522/j.cnki.ggps.2017.12.008 |
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| Transport and Distribution of Nitrate in Greenhouse Soil under Drip Fertigation |
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HUANG Wujin, DENG Limei, XIA Jianguo, LI Lan, YU Xiaoya, LU Shundan
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College of Resource Science, Sichuan Agricultural University, Chengdu 611130, China
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| Abstract: |
| Taking tomato as the model plant, this paper studied transport and distribution of nitrate in greenhouse soil under different drip fertigations. The combinations of three fertilizer application rates and four irrigation amounts were examined; the control was flooding irrigation. The results showed that the nitrate content in soil increased with the increase in irrigation and fertilizer application, and the content in top soil was higher than that in the subsoil. The nitrate distributed mainly in 0～40 cm, accounting for 82%～92% of the total nitrate in the soil. Compared with high irrigation and fertigation, saving-water and saving-fertilizer treatment reduced the accumulated nitrate in he whole soil profile by 36.65% and in 40~60 cm of soil by 62.18%, while compared with CK, it reduced the accumulated nitrate in 40～60 cm of soil by 53.42%. Under the experimental condition, reducing 30% of fertilizer and 50% of water is feasible and can effectively improve the utilization efficiency of nitrogenous fertilizer and ameliorate nitrate leaching. |
| Key words: greenhouse; fertigation; tomato; nitrate nitrogen; water |
