| 滴灌施肥对盐碱土壤盐分运移及草木樨生长的影响 |
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| 作者单位： | ;1.太原理工大学水利科学与工程学院;2.山西省农业科学院农业环境与资源研究所;3.山西省水利水电科学研究院 |
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| 摘 要： | 【目的】探究不同滴灌施肥条件对土壤盐分运移及对植物生长规律的影响。【方法】在大同盆地以草木樨为试验材料,以当地施肥习惯(N、P_2O_5、K_2O施量分别为180、90、36 kg/hm2)作为传统施肥量,设置5种不同的施肥水平,分别为传统施肥量的0%、40%、70%、100%、130%,分析了不同滴灌施肥水平下土壤电导率、pH值的变化情况及其对植物生长的影响。【结果】当施肥量为40%与70%时,滴头处溶质受淋洗作用较为明显,土壤电导率降幅较大;当施肥量为100%与130%时,表层土壤电导率较大,随土壤深度的增加而减小;土壤pH值随种植时间的延长得到一定的降低;70%处理下草木樨平均株高最高(138.6 cm),同时在此处理下0～100 cm土层土壤平均电导率为299μS/cm,平均pH值为7.73。【结论】N、P_2O_5、K_2O施量分别为126、63、25.2 kg/hm2时土壤电导率与pH值较小,同时草木樨生长最好。
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| 关 键 词： | 草木樨 土壤盐分 滴灌 盐碱土 |
The Growth of Melilotus and Salt Leaching in Salt-affected Soil under Drip Fertigation |
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| Institution: | ,College of Water Resources Science and Engineering,Taiyuan University of Technology,Institute of Agricultural Environment and Resources,Shanxi Academy of Agricultural Sciences,Shanxi Institute of Water Resources and Hydropower Sciences |
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| Abstract: | 【Objective】Crop growth and solute dynamics in soil are controlled by irrigation, and the purpose of this paper is to elucidate the movement of salt and melilotus growth in a salt-affected soil under drip fertigation.【Method】The experiment was conducted in Datong Basin in Shanxi province under different fertilization levels.The control was traditional fertilization used by local farmer with N∶P∶K being 180∶90∶36 kg/hm~2(CK). We examined five fertilization levels, which were 0%, 40%, 70%, 100% and 130% of the fertilizers used in CK. In each treatment, we measured the changes in electrical conductivity and pH of the soil under different fertilizations, as well as their effects on plant growth.【Result】When the applied fertilizer was 40% and 70% of those in CK, there was a noticeable salt leaching in the proximity of the emitter, evidenced from the increase in electrical conductivity. When the fertilizer application increased to 100% and 130% of that in CK, the electrical conductivity of the top soil showed a moderate increase. Soil pH decreased slightly after planting, and the average plant height under70% of CK fertilization was the highest being 130.6 cm, with the associated average soil electrical conductivity being 299 μS/cm and the average pH being 7.73.【Conclusion】Fertigation at 70% of that in CK with N∶P∶K being 126∶63∶25.2 kg/hm~2 reduced soil electrical conductivity and pH, thus benefiting plant growth and yield. |
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| Keywords: | melilotus soil salt drip irrigation saline-sodic soil |
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