| Effect of returning straw with straw-decomposing inoculants on saline-alkali soil in North Yinchuan of China |
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| DOI：10.7606/j.issn.1000-7601.2017.06.31 |
| Key Words: saline-alkali soil straw returning straw-decomposing inoculant soil improvement rice quality |
| Author Name | Affiliation | | WANG Jing | School of Agriculture Ningxia University, Yinchuan 750021, China
Institute of Environmental Engineering, Ningxia University, Yinchuan 750021, China | | XIAO Guo-ju | Institute of Environmental Engineering, Ningxia University, Yinchuan 750021, China | | ZHANG Feng-ju | Institute of Environmental Engineering, Ningxia University, Yinchuan 750021, China | | WANG Jun | Qianjin farm of bureau of reclam
ation in ningxia，Pingluo 753402, China | | XU Xing | School of Agriculture Ningxia University, Yinchuan 750021, China |
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| Abstract: |
| The effict of returning straw with different straw-decamposing in oculants on rice growth and the physical-chemical propertres of soil. A field experiment, with six treatments: only straw returning as control,straw returning+“wotutiandi”, “hongshengyuan”, “guling”, “junde”, “nongfukang” straw-decomposing inoculants as treatments. Results showed that (1) applying straw-decomposing inoculants enhanced rice seedling emergence and survival rate of seedlings. In comparison to control, both rice seedling emergence and survival rate of seedlings were significantly increased with straw returning “junde” straw-decomposing inoculants. (2) In comparison to control, setting percentage was increased with straw returning+“junde”straw-decomposing inoculants up to 77.3%. (3) The contentration of soil organic matter, total nitrogen, alkali-hydrolysable nitrogen, available prosphorus and available potassium under the treatment of returning straw+“junde”straw-decomposing inoculants were higher than those with the treatment of returning single straw only. (4) The percentage of soil dry-aggregates >0.25 mm under straw returning and straw-decomposing inoculants addition were increased by 46.18%, but those <0.25 mm were decreased. Straw returning+“wotutiandi” straw-decomposing inoculants decreased the bulk density by 1.46 g·cm-1, down 7.6% than CK, and increased the soil water contents from 1.88% to 10.8%. (5) The rice yield were increased by straw-decomposing inoculants, and the highest increment rates were 4.64%. (6) The treatments of straw returning added with different straw-decomposing inoculants improved the appearance quality of rice, chalky rice rate but reduced the cooking quality of gel consistency. There were no significant influence on rice nutrition quality among different straw-decomposing inoculants treatments. In conclusion, straw returning added straw-decomposing inoculants improved rice yield and soil properties. Except the soil bulk density, all the tested items are enhanced with the treatments of straw returning plus inoculants than those with straw returning only. Therefore, the addition of straw-decomposing inoculants is recommended in saline-alkali soil for high efficient straw returning. |
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