| 肖国举,罗成科,张峰举,秦萍.脱硫石膏施用时期和深度对改良碱化土壤效果的影响[J].干旱地区农业研究,2009,27(6):197~203 |
| 脱硫石膏施用时期和深度对改良碱化土壤效果的影响 |
| Impacts of the applied period and depth of desulfurized gypsum on improving the alkaline soil |
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| DOI：10.7606/j.issn.1000-7601.2009.06.38 |
| 中文关键词: 脱硫石膏 碱化土壤 施用时期 施用深度 油葵 出苗率 产量 |
| 英文关键词:desulfurized gypsum alkaline soil period of application depth of application sunflower seedling rate yield |
| 基金项目:国家科技支撑计划(2007BAC08B01) |
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| 摘要点击次数: 169 |
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| 中文摘要: |
| 选择宁夏西大滩碱化土壤,以油葵为供试作物,采用两因素随机区组设计,进行脱硫石膏改良碱化土壤的田间试验研究。结果表明,脱硫石膏施用时期和施用深度不同,对改良土壤碱性和促进作物生长发育的效果不同。秋季施用较春季施用油葵出苗率提高38.0%,产量提高39.0%;深施(25 cm)脱硫石膏较浅施(10 cm)油葵出苗率提高6.3%,产量提高6.0%。秋季深施较秋季浅施、春季深施、春季浅施油葵出苗率分别提高12.0%、25.6%、21.5%,产量分别提高14.4%、32.7%、29.9%,表明秋季深施较秋季浅施、春季深施及春季浅施对促进油葵生长发育,提高产量效果更显著。 |
| 英文摘要: |
| A research on the period and depth of desulfurized gypsum being used in improving the alkalized soil is taken by applying desulfurized gypsum and planting oil sunflower on a piece of typical alkalized land in Xidatan of Ningxia.The experimental results show that applying desulfurized gypsum in different periods and depths has different effects on promoting the growth and yield of sunflower.If the desulfurized gypsum is applied in autumn other than in spring,the effect will be more distinct as the survival rate of sunflower seedlings can be improved by 21.2%～45.5%,and the yield can be increased by 16.2%～52.6%.If the desulfurized gypsum is deeply(25 cm) applied other than shallowly(10 cm) applied,the survival rate of sunflower seedlings and the yield can be respectively improved by 1.2%～5.4% and 1.2%～11.7%.When the desulfurized gypsum is applied in a different combination of period and depth,it will bring a different effect in improving the survival rate and yield.The effect on improving the growth of sunflower will be more distinct if the desulfurized gypsum is applied deeply in autumn,better than shallowly in autumn,deeply in spring or shallowly in spring.When it is applied deeply in autumn other than shallowly in autumn,deeply in spring or shallowly in spring,the survival rate of seedlings are respectively improved by 12.0%,25.6% and 21.5%,and the yield are respectively improved by 14.4%,32.7% and 29.9%.As the soil in Xidatan of Ningxia is deeply(25 cm) ploughed in autumn after harvest and is watered in winter,it is recommended that the desulfurized gypsum shall be applied deeply in autumn to improve alkalized soil. |
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