水土保持学报2018，Vol.32Issue(1)：327-331,338,6.DOI:10.13870/j.cnki.stbcxb.2018.01.051
干湿交替灌溉对富硒土壤硒形态及水稻硒积累的影响
Effects of Wetting and Drying Alternated Irrigation on Soil Selenium Forms and Rice Selenium Accumulation in Se-enriched Soil
摘要
Abstract
Pot experiments with selenium-enriched soil were conducted to investigate the effects of moisture condition on selenium forms in soil and selenium accumulation in rice.The treatments included alternation of wetting and moderate drying (AWMD),alternation of wetting and severe drying (AWSD),conventional (C) and flooding (F) water management.The results showed that the rice grain yield was the highest in the AWMD treatment,22.17％ higher than that of the F treatment,and the difference between these two treat ments was significant.The selenium contents in different parts of rice were in the order of root (0.411～ 0.695 mg/kg) ＞ stem (0.214～0.378 mg/kg) ＞ leaf (0.187～0.327 mg/kg) ＞ shell (0.156～0.235 mg/kg) ＞ grain (0.132～0.185 mg/kg) in all treatments.The selenium contents of grain and available selenium contents in soil both were the highest in the AWSD treatment,and the lowest in the F treatment,and the selenium contents of grain was significantly different between the two treatments.Significant or extremely significant positive correlations were found between the available selenium contents in soil and selenium contents in roots,stem,shell and grain of rice.The correlation coefficients were 0.939**,0.896**,0.793**and 0.723*,respectively.The selenium absorption coefficient in rice root was the highest in the AWSD treatment (0.438),and the lowest in F treatment (0.259),indicating that the dry and wet alternation enhanced selenium absorption capacity of rice.In summary,wetting and drying alternated irrigation could not only improve rice yield,but also increase selenium absorption of rice,and this kind of irrigation saved water than normal management.The overall performance of the AWMD treatment was the best.关键词
干湿交替/富硒土壤/硒形态/硒含量Key words
alternation of wetting and drying/Se-enriched soil/Se forms/Se accumulation分类
农业科技引用本文复制引用
张青,王煌平,孔庆波,栗方亮,安梦鱼,罗涛..干湿交替灌溉对富硒土壤硒形态及水稻硒积累的影响[J].水土保持学报,2018,32(1):327-331,338,6.基金项目
福建省省属公益项目“干湿交替条件下对红壤中硒、镉有效性及对水稻吸收的影响”(2015R1022-9) （2015R1022-9）
国家科技支撑计划项目“南方轻中度重金属污染耕地防治调控技术集成示范”(2015BAD05B01) （2015BAD05B01）
