Influence of soil bulk density on distribution and uniformity of water and nitrogen under film hole irrigation with fertilizer liquid free infiltration
Based on the indoor experiments, the influences of soil bulk density on distribution and uniformity of soil moisture, NO<sub>3</sub><sup>-</sup>-N and NH<sub>4</sub><sup>+</sup>-N under film hole irrigation with fertilizer liquid free infiltration were...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Zhejiang University Press
2010-11-01
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| Series: | 浙江大学学报. 农业与生命科学版 |
| Subjects: | |
| Online Access: | https://www.academax.com/doi/10.3785/j.issn.1008-9209.2010.06.009 |
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| Summary: | Based on the indoor experiments, the influences of soil bulk density on distribution and uniformity of soil moisture, NO<sub>3</sub><sup>-</sup>-N and NH<sub>4</sub><sup>+</sup>-N under film hole irrigation with fertilizer liquid free infiltration were studied. The results showed that soil moisture and NH<sub>4</sub><sup>+</sup>-N decreased around the film hole; NO<sub>3</sub><sup>-</sup> -N first increased and then decreased around the film hole; the lager the soil bulk density was, the smaller the distribution distance of soil moisture, NO<sub>3</sub><sup>-</sup>-N and NH<sub>4</sub><sup>+</sup>-N in horizontal and vertical direction were, and the smaller the accumulative infiltration quantity of fertilizer liquid was. The lager the soil bulk density was, the smaller the uniformity coefficient of soil moisture and NO<sub>3</sub><sup>-</sup>-N were, but the lager the uniformity coefficient of NH<sub>4</sub><sup>+</sup>-N was. The results lay a foundation for further research of film hole fertilizer liquid irrigation technology. |
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| ISSN: | 1008-9209 2097-5155 |