砾石暗沟提高脱硫石膏改良龟裂碱土效果及油葵产量
针对龟裂碱土质地黏重、透水性差、难以改良利用等瓶颈问题,该研究采用砾石暗沟改良技术,在统一施用脱硫石膏22.5 t/hm2和淋洗定额4 500 m-3/hm-2的基础上,研究不同暗沟间距（3、6、9 m）及砾石垫层厚度（25、30、35 cm）对龟裂碱土理化性质、盐分离子浓度、油葵产量的影响。试验结果表明：1）灌水洗盐过程中砾石暗沟的设置有利于提高土壤渗透性,保持脱盐状态,暗沟间距越小脱盐效果越显著;2）砾石暗沟处理下土壤Na-＋、CO3-（2-）、HCO3--、Cl--浓度显著减少,其中Na-＋是最主要阳离子,其Cl--的相关性最大,其次为SO4-（2-）;3）在暗沟间距3 m、砾石层厚度3...
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| Published in | 农业工程学报 Vol. 33; no. 22; pp. 143 - 151 |
|---|---|
| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
宁夏大学资源环境学院,银川 750021
2017
宁夏大学土木与水利工程学院,银川,750021%宁夏大学土木与水利工程学院,银川 750021 宁夏(中阿)旱区资源评价与环境调控重点实验室,银川 750021%宁夏大学环境工程研究院,银川,750021%宁夏大学资源环境学院,银川,750021 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1002-6819 |
| DOI | 10.11975/j.issn.1002-6819.2017.22.018 |
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| Abstract | 针对龟裂碱土质地黏重、透水性差、难以改良利用等瓶颈问题,该研究采用砾石暗沟改良技术,在统一施用脱硫石膏22.5 t/hm2和淋洗定额4 500 m-3/hm-2的基础上,研究不同暗沟间距（3、6、9 m）及砾石垫层厚度（25、30、35 cm）对龟裂碱土理化性质、盐分离子浓度、油葵产量的影响。试验结果表明：1）灌水洗盐过程中砾石暗沟的设置有利于提高土壤渗透性,保持脱盐状态,暗沟间距越小脱盐效果越显著;2）砾石暗沟处理下土壤Na-＋、CO3-（2-）、HCO3--、Cl--浓度显著减少,其中Na-＋是最主要阳离子,其Cl--的相关性最大,其次为SO4-（2-）;3）在暗沟间距3 m、砾石层厚度35 cm的处理下（T3）,第1年0-40 cm土层pH值、碱化度分别比CK（无暗沟处理）降低11.6%、32.2%,第2年分别降低12.4%、39.6%;4）T3处理油葵出苗率和产量最高,第1年产量为CK的2.87倍,第2年为CK的3.44倍。因此,砾石暗沟能促进脱硫石膏改善龟裂碱土理化性质,提高作物产量。 |
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| AbstractList | S278; 针对龟裂碱土质地黏重、透水性差、难以改良利用等瓶颈问题,该研究采用砾石暗沟改良技术,在统一施用脱硫石膏22.5 t/hm2和淋洗定额4500 m3/hm2的基础上,研究不同暗沟间距(3、6、9 m)及砾石垫层厚度(25、30、35 cm)对龟裂碱土理化性质、盐分离子浓度、油葵产量的影响.试验结果表明:1)灌水洗盐过程中砾石暗沟的设置有利于提高土壤渗透性,保持脱盐状态,暗沟间距越小脱盐效果越显著;2)砾石暗沟处理下土壤Na+、CO32-、HCO3-、Cl-浓度显著减少,其中Na+是最主要阳离子,其Cl-的相关性最大,其次为SO42-;3)在暗沟间距3 m、砾石层厚度35 cm的处理下(T3),第1年0~40 cm土层pH值、碱化度分别比CK(无暗沟处理)降低11.6%、32.2%,第2年分别降低12.4%、39.6%;4)T3处理油葵出苗率和产量最高,第1年产量为CK的2.87倍,第2年为CK的3.44倍.因此,砾石暗沟能促进脱硫石膏改善龟裂碱土理化性质,提高作物产量. 针对龟裂碱土质地黏重、透水性差、难以改良利用等瓶颈问题,该研究采用砾石暗沟改良技术,在统一施用脱硫石膏22.5 t/hm2和淋洗定额4 500 m-3/hm-2的基础上,研究不同暗沟间距（3、6、9 m）及砾石垫层厚度（25、30、35 cm）对龟裂碱土理化性质、盐分离子浓度、油葵产量的影响。试验结果表明：1）灌水洗盐过程中砾石暗沟的设置有利于提高土壤渗透性,保持脱盐状态,暗沟间距越小脱盐效果越显著;2）砾石暗沟处理下土壤Na-＋、CO3-（2-）、HCO3--、Cl--浓度显著减少,其中Na-＋是最主要阳离子,其Cl--的相关性最大,其次为SO4-（2-）;3）在暗沟间距3 m、砾石层厚度35 cm的处理下（T3）,第1年0-40 cm土层pH值、碱化度分别比CK（无暗沟处理）降低11.6%、32.2%,第2年分别降低12.4%、39.6%;4）T3处理油葵出苗率和产量最高,第1年产量为CK的2.87倍,第2年为CK的3.44倍。因此,砾石暗沟能促进脱硫石膏改善龟裂碱土理化性质,提高作物产量。 |
| Abstract_FL | Takyric solonetz, is a kind of alkaline soil, which is quite unique in China and even in the world. In Northern Ningxia,China, this soil belongs to a kind of clay with a big soil bulk density and a badly structured physical property. So, after irrigation, dispersed soil particles in clay lead to low soil porosity, and poor permeability and salt is difficult to be quickly washed away. In order to explore the effect of different blind ditch spacing and gravel cushion thickness on the physical-chemical properties of takyric solonetz, salt ion concentration and oil sunflower yield, a field experiment was carried out in Pingluo County of Ningxia. A total of 3 kind of blind ditch spacing (3 , 6 , 9 m) and 3 gravel cushion thicknesses (25, 30, and 35 cm) were designed. Besides, the desulfurized gypsum (22.5 t/hm2) and leaching amount (4500 m3/hm2) were applied. Then, the soil physical and chemical properties, soil salt ion concentration and yield of oil sunflower of different treatments were measured to determine the amelioration effect of gravel blind ditch. The test items were permeability of soil, soil pH value, exchangeable sodium percentage (ESP), total salinity and salt ion concentration. The results showed that the gravel blind ditch could improve water permeability of soil and keep desalination by leaching. The desalination effect was closely related to blind ditch spacing and gravel cushion thickness. The smaller the blind ditch spacing and the gravel cushion thickness, the more significant the effect. In the soil layer of 0-40 cm under the gravel blind ditch treatment, the concentration of 4 ions (Na+, CO32-, HCO3-, Cl-) significantly decreased and the Ca2+ and SO42- concentration increased compared with those under CK. In addition, there was little variation for the concentration of Mg2+ and K+. The result of Person analysis showed that Na+ was greatly related to Cl- and SO42- and it was an important cation of takyric solonetz. The blind ditch spacing of 3 m and gravel cushion thickness of 35 cm decreased soil pH value, ESP, and total salinity in 0-40 cm by 11.7%, 32.3% compared to CK treatment in the first year. In the second year, the values of pH, ESP and total salinity decreased by 12.5%, 39.6%. Furthermore, the yield of oil sunflower was 2.87 and 3.44 times that of CK respectively in the first and second year. The hydrodynamic force was higher in the blind ditch nearby, where the water moved fast. In the upper soil of blind ditch, the soil salinity infiltrated into the blind ditch along with water. Furthermore, the blind ditch density and gavel straw bed could shorten migration distance of soil salinity so that the soil salinity could be more easily discharged by blind ditch. This could reduce the soil salinity effectively and accelerate the process of salt leaching. Thus we conclude that the subsurface gravel blind ditch is able to improve the newly reclaimed takyric solonetz land most effectively and increase the yield of oil sunflower. These results will also provide a technical support for the salt-water management of the newly reclaimed takyric solonetz farmlands, and a guide for the sustainable development and utilization of waste takyric solonetz land. |
| Author | 王旭 孙兆军 韩磊 马飞 王芳 何俊 |
| AuthorAffiliation | 宁夏大学土木与水利工程学院,银川750021 宁夏大学资源环境学院,银川750021 宁夏（中阿）旱区资源评价与环境调控重点实验室,银川750021 宁夏大学环境工程研究院,银川750021 |
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| Author_FL | Han Lei Wang Fang Wang Xu He Jun Sun Zhaojun Ma Fei |
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| DOI | 10.11975/j.issn.1002-6819.2017.22.018 |
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| Keywords | 淋洗 gravel blind ditch 砾石暗沟 leaching 土壤盐分 alkalinity 碱化度 龟裂碱土 soil salinity crop yield 灌溉 irrigation takyric solonetz 作物产量 |
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| Notes | 11-2047/S irrigation; leaching; alkalinity; takyric solonetz; gravel blind ditch; soil salinity; crop yield Takyric solonetz, is a kind of alkaline soil, which is quite unique in China and even in the world. In Northern Ningxia,China, this soil belongs to a kind of clay with a big soil bulk density and a badly structured physical property. So, after irrigation, dispersed soil particles in clay lead to low soil porosity, and poor permeability and salt is difficult to be quickly washed away. In order to explore the effect of different blind ditch spacing and gravel cushion thickness on the physical-chemical properties of takyric solonetz, salt ion concentration and oil sunflower yield, a field experiment was carried out in Pingluo County of Ningxia. A total of 3 kind of blind ditch spacing （3 , 6 , 9 m） and 3 gravel cushion thicknesses （25, 30, and 35 cm） were designed. Besides, the desulfurized gypsum （22.5 t/hm2） and leaching amount （4500 m3/hm2） were applied. Then, the soil physical and chemical properties, so |
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| SubjectTerms | 作物产量 土壤盐分 淋洗 灌溉 砾石暗沟 碱化度 龟裂碱土 |
| Title | 砾石暗沟提高脱硫石膏改良龟裂碱土效果及油葵产量 |
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