| 盐分胁迫下喷施γ-氨基丁酸对水稻秧苗生长的影响 |
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| 引用本文： | 孙建平,赵子婧,戴相林,路垚,何宗均,刘雅辉.盐分胁迫下喷施γ-氨基丁酸对水稻秧苗生长的影响[J].中国稻米,2022,28(6):43-48. |
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| 作者姓名： | 孙建平 赵子婧 戴相林 路垚 何宗均 刘雅辉 |
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| 作者单位： | 1.天津天隆科技股份有限公司，天津 300457;2.南开大学 环境科学与工程学院，天津 300350;3.潍坊科技学院，山东 寿光262700 |
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| 基金项目： | 河北省省级科技计划资助项目(19227307D);河北省农林科学院科技创新专项(2022KJCXZX-BHS-6);河北省农林科学院科技创新人才队伍建设项目(C21R1603) |
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| 摘 要： | 为探究喷施γ-氨基丁酸（GABA）对不同程度盐分胁迫下水稻秧苗生长的影响，以天津主栽粳稻品种天隆优619为研究对象，在秧苗采用穴盘培育到3叶1心时，分别用0、25、50、75、100 mmol/L NaCl溶液水培，并设置叶面喷施4 mmol/L GABA处理，以叶面喷水作为对照组，调查水稻的生长指标和3种抗氧化酶活性。结果表明，随着盐分胁迫程度的增加，水稻的株高增量、叶面积呈下降趋势，死叶率、根系干鲜比、叶片POD和SOD酶活性呈上升趋势，根系活力和叶片APX酶活性呈先升后降趋势。在相同盐分胁迫下，与不喷施GABA对照相比，喷施GABA处理表现为：株高增量增加1.7%~32.4%，死叶率降低1.6%~23.3%，根干质量减少9.3%~22.0%，根系活力增加1.2%~94.4%，叶片POD、SOD和APX酶活性分别增加5.0%~20.8%、9.8%~17.3%和7.2~64.4%。可见，叶面喷施4 mmol/L GABA能够提高供试水稻的耐盐性，促进同化物优先向地上部分配。
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| 关 键 词： | 粳稻 盐分胁迫 γ-氨基丁酸 幼苗 抗氧化酶活性 |
| 收稿时间： | 2022-06-13 |
Effects of Spraying GABA on Growth of Rice Seedlings under Salt Stress |
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| SUN Jianping,ZHAO Zijing,DAI Xianglin,LU Yao,HE Zongjun,LIU Yahui.Effects of Spraying GABA on Growth of Rice Seedlings under Salt Stress[J].China Rice,2022,28(6):43-48. |
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| Authors: | SUN Jianping ZHAO Zijing DAI Xianglin LU Yao HE Zongjun LIU Yahui |
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| Institution: | 1.Tianjin Tianlong Technology Corporation Limited, Tianjin 300457, China;2.College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China;3.Weifang University of Science and Technology, Shouguang, Shandong 262700, China |
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| Abstract: | The effects of cold-adapted microbial consortium HT20 on rice straw decomposition, nutrient release characteristics and soil nutrient dynamics in the coastal rice area of eastern Hebei were investigated. The experiment adopted the litter bag method, and set up three treatments: straw returning to the field without straw-decomposing inoculants（CK）, straw returning to the field with the application of Nongfukang（JF） and straw returning to the field with the application of HT20（JH）. Straw and soil samples were partially removed for analysis at the transplanting stage, tillering stage, jointing stage, booting stage, heading stage, milk ripening stage, and the maturation stage. Then, the straw mass, nitrogen, phosphorus, and potassium nutrient residue rates for the straw and soil nutrient content were determined. Compared with CK and JF treatment, the residual rate for straw mass in the JH treatment decreased by 9.01%-24.08% and 4.68%-11.31% during the sampling period respectively, the residual rate for straw nitrogen decreased by 15.56%-24.94% and 26.54%-36.31% during the transplanting stage and jointing stage, the residual rate for straw phosphorus decreased by 9.68% and 11.28% at the jointing stage, the residual rate for straw potassium was no significant difference among them, the residual rates of nitrogen, phosphorus and potassium increased negatively in the later stage. Compared with CK and JF treatment, the soil available nitrogen contents in the JH treatment increased by 53.33% and 4.55% at the tillering stage, respectively; the soil available phosphorus content increased by 195.62% and 65.80% at the jointing stage, and increased by 138.14% and 195.62% at the heading stage, respectively; the soil available potassium content increased by 7.64%-168.87% and 29.34%-179.30% during the sampling period, respectively. Compared with CK and JF treatment, the number of tillers in the JH treatment significantly increased by 14.10% and 16.57%, and the rice yield increased by 11.25% and 17.11%. It can be seen that the cold-adapted microbial consortium（HT20） could speed up the decomposition process of returning straws and the release of straw nutrients, improve soil fertility, promote rice tillering and growth, and then increase rice yield. |
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| Keywords: | rice cold-adapted microbial consortium HT20 straw decomposition nutrients release soil nutrients coastal rice area in eastern Hebei |
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