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首页> 美国卫生研究院文献>Scientific Reports >Improved crop yield and reduced nitrate nitrogen leaching with straw return in a rice-wheat rotation of Ningxia irrigation district
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Improved crop yield and reduced nitrate nitrogen leaching with straw return in a rice-wheat rotation of Ningxia irrigation district

机译：宁夏灌区稻麦轮作提高农作物产量并减少秸秆还田带来的硝态氮淋失

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Field experiments were conducted in rice-wheat rotation under conventional management to determine the effects of straw return ((half straw return, HS) and (total straw return, TS)) on crop yield, N uptake, soil properties and soil NO3−–N leaching. We found that straw return significantly increased crop yield and N uptake. TS significantly increased soil SOM at depths of 20 cm and 30 cm. Straw return had significantly increased soil NO3−–N leaching at a depth of 10 cm, whereas significantly decreased soil NO3−–N leaching at depths of 30 cm and 90 cm in the rice season. In wheat season, HS and TS performed better than conventional fertilization management without straw return in reducing soil NO3−–N leaching at depth of 90 cm. Soil NO3−–N leaching was significantly decreased through enhancing total N uptake, improving soil aggregation and decreasing soil NO3−–N concentration. Our results indicated that total straw return has the potential to increase crop yield, improve soil aggregation and decrease soil NO3−–N concentration, thus increasing total N uptake and reducing soil NO3−–N leaching in the rice-wheat rotation system of Ningxia Yellow river irrigation district. In the future, the long-term observation of crop yield and nitrate nitrogen leaching are necessary to identify the environmentally friendly straw return practices for rice-wheat rotation.
机译：在常规管理下在稻麦轮作中进行田间试验，以确定秸秆还田（半秸秆还田，总秸秆还田）对作物产量，氮素吸收，土壤特性和土壤NO3 − –N浸出。我们发现秸秆还田显着提高了作物产量和氮素吸收。 TS在20 increasedcm和30 cm的深度显着增加了土壤SOM。秸秆还田在10 cm深度显着增加了土壤NO3 - -N淋溶，而在30 cm和90 cm深度显着减少了NO3 - -N淋溶稻米季节。在小麦季节，HS和TS的表现优于传统的施肥管理，没有秸秆还田，减少了90 cm深度的土壤NO3 - -N淋溶。通过增加总氮素吸收，改善土壤聚集和降低土壤NO3 - -N的浓度，可显着减少土壤NO3 - -N的淋溶。我们的结果表明，秸秆还田总潜力有可能增加作物产量，改善土壤聚集并降低土壤NO3 - -N的浓度，从而增加总氮的吸收并减少土壤NO3 - –N淋溶。将来，必须长期观察农作物的产量和硝态氮的淋失，才能确定稻麦轮作的环保秸秆还田方式。

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