| 尹爱经,薛利红,杨林章,段婧婧,侯朋福.生活污水氮磷浓度对水稻生长及氮磷利用的影响[J].农业环境科学学报,2017,36(4):768-776. |
| 生活污水氮磷浓度对水稻生长及氮磷利用的影响 |
| Effects of the N and P concentrations in domestic wastewater on the growth,N and P uptakes of rice |
| 投稿时间：2016-11-22 |
| DOI：10.11654/jaes.2016-1472 |
| 中文关键词: 生活污水灌溉 氮磷 水稻 产量 |
| 英文关键词: domestic wastewater irrigation nitrogen and phosphorus rice yield |
| 基金项目:公益性行业（农业）科研专项（201503106）；江苏省自主创新项目（CX（14）2050）；江苏省博士后科研资助计划项目（1601109C） |
|
| 摘要点击次数: 3131 |
| 全文下载次数: 4064 |
| 中文摘要: |
| 通过设置不同N、P浓度的生活污水进行水稻盆栽实验，研究了生活污水灌溉对水稻生长、产量以及氮磷吸收利用的影响。结果表明，在正常灌溉和不施肥条件下，污水灌溉明显降低了水稻施肥期的田面水氮磷浓度，水稻移栽后70 d左右田面水N、P浓度与不施肥处理田面水N、P浓度趋于一致；污水TN、TP浓度与水稻的生长指标和产量密切相关，生活污水灌溉提高了穗粒数、千粒重和结实率，但穗数明显减少，导致产量下降；当污水中总氮浓度达20~25 mg·L-1、总磷浓度达1.0~1.5 mg·L-1时，不施任何化肥条件下水稻产量即可达到常规化肥处理的95%，差异不显著，此时污水灌溉中带入的氮仅为常规施肥处理氮用量的64.1%和磷肥用量的23.2%。与常规化肥处理相比，污水灌溉提高了水稻的N、P利用效率，水稻对N、P的吸收利用与污水中的N、P浓度成正相关，且污水中的N、P存在着正交互作用，即提高P浓度促进了N的吸收利用，提高N浓度促进了P的吸收利用。在应用生活污水进行稻田灌溉时，需在分蘖期配施一定的化肥从而保证水稻高产。 |
| 英文摘要: |
| In this study, rice pot experiment irrigated with domestic wastewater in different N and P concentrations was carried out to investigate the effects on rice growth, yield and uptakes of N and P. Compared to common chemical fertilizer treatment, domestic wastewater irrigation significantly decreased the concentrations of N and P in the surface water, and the N and P concentrations decreased to the level of zero-N fertilizer treatment about 70 day after transplant. The growth status and yields of rice was closely related to the concentrations of N and P in domestic wastewater under normal irrigation without chemical fertilizer input condition. The spikelet number per panicle,1000-grain weight, and filled spikelets rate were increased, but the panicle number was significantly decreased with domestic wastewater irrigation, therefore, the final yield showed a decreasion. When the TN and TP concentration in domestic wastewater was 20~25 mg·L-1 and 1.0~1.5 mg·L-1, the rice yield could be 95% of that with normal chemical fertilizer and the difference was not significant, but the N and P inputs by domestic wastewater were only 64.1% and 23.2% of normal chemical fertilizer treatment. The N and P use efficiency of rice was enhanced by domestic wastewater irrigation when compared to the normal chemical fertilizer treatment. The uptakes of N and P by rice were positively correlated with the concentrations of N and P in the domestic wastewater, and a positive interaction between N and P in domestic wastewater was observed. If paddy fields was irrigated with domestic wastewater, a certain amount of chemical fertilizer should be applied during tillering stage to ensure the high yield of rice. |
| HTML
查看全文
查看/发表评论 下载PDF阅读器 |
|
|
|
