吉林农业大学学报2018，Vol.40Issue(6)：707-715,9.DOI:10.13327/j.jjlau.2018.3159
种稻年限对苏打盐碱土腐殖质含量及组成的影响
Effects of Different Rice Cultivation Years on Humus Content and Composition of Soda Saline-alkaline Soil
摘要
Abstract
Rice cultivation is one of the effective measures in improving soda saline-alkaline soil, and the study of improvement effects and mechanisms of soda saline-alkaline soil by growing rice can enrich improvement and utilization theory of soda saline-alkaline soil. In this paper, we have studied the effects of different rice cultivation years on humus content and composition of soda saline-alkali soil by field experiment. The results show that with the increase of planting age, organic carbon content of each soil profile layer has increased obviously. The comparison between soil of growing ricefor 40 years and waste grassland soil with no rice cultivation shows that organic carbon content of tillage layer, plough bottom layer, subsoil layer of soil profiles has increased by 19. 89, 15. 72 and10. 71 g/kg, respectively. In tillage layer, with the increase of planting age, total content of extractable humus is on the increase; content of free humus extracted by 0. 1 mol/L NaOH in 40-year rice growing soil is the highest, increasing by 7. 1, 6. 9 and 3. 62 g/kg compared with tillage layer, plough bottom layer, subsoil layer of waste grassland soil with no rice cultivation; content of combined humus extracted by 0. 1 mol/L Na4P2O7 in 40-year rice cultivation is the highest, increasing by8. 37, 9. 36 and 7. 70 g/kg compared with tillage layer, plough bottom layer, subsoil layer of waste grassland soil with no rice cultivation. Content of free HA and FA in each profile layer has reached the peak in soil of growing rice for 40 years; content of combined HA in each layer of soil of growing rice for 40 years is the highest, content of FA tends to increase with the years added. PQ in tillage layer has increased with the increase of planting age. HA has been classified by Kumada method, and with the increase of planting age, free HA of each profile layer has all turned to Rp type; combined HA has changed from A to P to B to A in tillage layer and from A to B to A in plough bottomlayer layer, indicating that rice cultivation will reduce aromatization degree of free humic acid, and structure tends to be simplified while combination state of humic acid remains more complex structure.关键词
种稻年限/苏打盐碱土/腐殖质Key words
rice cultivation year/soda saline-alkaline soil/humus分类
农业科技引用本文复制引用
刘胜楠,赵兰坡..种稻年限对苏打盐碱土腐殖质含量及组成的影响[J].吉林农业大学学报,2018,40(6):707-715,9.基金项目
国家科技支撑计划项目(2013BAC09B01) （2013BAC09B01）
吉林省科技厅重大科技攻关项目(20130204050SF) （20130204050SF）
