江西农业大学学报2017，Vol.39Issue(5)：871-876,6.DOI:10.13836/j.jjau.2017112
不同蓄水深度的水分管理对稻田养分流失潜力的影响
Effects of Water Management in Different Water Storage Depth on Nutrient Loss Potential of Rice Field
摘要
Abstract
In order to explore the effects of water management in different water storage depth after mixed fertilizer application on nutrient loss potential of spring ploughing rice field,the key technologies of "stagnant water time control" and"irrigation water management system" were used to study the loss potential of nitrogen and phosphorus in three treatments with different depths namelly H3,H6 and H9.The results showed that:(1) the relative loss load of NO3--N in the treated plots fields gradually increased after the first day,and the high-est value occurred on the fifth day,then the loss load revealed a declining trend,but the loss level was still high.(2) For the relative loss load of NH4+-N,the peak value of H6 happened on the first day,which reached 89.34 mg.In addition,the loss values of H3 and H9 were also high on the first day.Although the relative loss load of H3,H6 and H9decreased after the first day,and their values were at low levels after the fifth day,the relative loss load was generally in the order of H6>H3>H9.(3) The relative loss load of TP in the H6 and H9 reached high levels after the third day,then decreased to the lower levels on the fifth day.However,the value of H3 increased after the third day,and reached the highest value of 55.45 mg on the fifth day.(4) The relative loss load of TN in H6,H9 and H3 reached the highest values on the first day,then they declined rapidly and were at lower levels after the fifth day.It can be concluded as follows.(1) Through drainage after the third day or the seventh day during the stagnant water,H3 ,H6 and H9 can effectively reduce the discharge of NO3--N in the rice field.(2) Through drainage after the fifth and seventh day,during the stagnant water,H3 and H9 can effectively reduce the discharge of NH4+-N.(3) Through drainage after the fifth day during the stagnant wa-ter,H9 and H6 treatments can effectively reduce the TP discharge.(4) Through drainage after the fifth day dur-ing the stagnant water,H3 and H9 treatments can effectively reduce the discharge of TN.关键词
水分管理/养分流失潜力/影响Key words
water management/potential of nutrient loss/influence分类
农业科技引用本文复制引用
冯国禄,许尤厚,杨斌,张虹,王鹏良,梁铭忠,陆来仙,田义超..不同蓄水深度的水分管理对稻田养分流失潜力的影响[J].江西农业大学学报,2017,39(5):871-876,6.基金项目
国家自然科学基金( 31360322)和广西自然科学基金( 2014jjAA30205) Project supported by the National Natural Science Foundation of China ( 31360322) and the Natural Science Foundation of Guangxi( 2014jjAA30205) （ 31360322）
