摘要
为了探讨耕作方式和水分管理对水稻土壤肥力性状的影响,2007年晚季和2008年早季以‘金优253’为材料进行大田试验,设置常耕、免耕二种土壤耕作方式,浅水层灌溉、交替灌溉、水气平衡灌溉三种水分管理方式,然后在水稻成熟期测定分析土壤肥力因子的变化。结果表明,土壤碱解氮含量以浅水层灌溉最高,水气平衡灌溉次之,交替灌溉的最低,土壤有效磷含量从高到低分别为水气平衡灌溉、交替灌溉、浅水层灌溉;土壤速效钾含量从高到低分别为交替灌溉、水气平衡灌溉、浅水层灌溉;土壤有机质含量从高到低分别为水气平衡灌溉、浅水层灌溉、交替灌溉;土壤pH从高到低分别为水气平衡灌溉、交替灌溉、浅水层灌溉。3种灌溉方式下常耕稻田土壤碱解氮、有效磷和有机质含量含量高于免耕稻田,免耕稻田pH、土壤速效钾含量却高于常耕稻田。水分管理对土壤肥力的影响比耕作方式的影响更大。
Field experiments were conducted in the late season of 2007 and in the early season of 2008 to compare the differences of soil fertility factors in rice paddy under no tillage,conventional tillage with water layer irrigation,alternation irrigation and wet irrigation.Results showed that the greatest alkali hydrolysable nitrogen content was observed under water layer irrigation followed by wet irrigation and alternation irrigation;the greatest available phosphorus content was observed under wet irrigation followed by alternation irrigation and water layer irrigation;the greatest available potassium content was observed under alternation irrigation followed by wet irrigation and water layer irrigation;the greatest organ matter content was observed under wet irrigation followed by water layer irrigation and alternation irrigation;the greatest pH value was observed under wet irrigation followed by alternation and water layer irrigation.Under the same irrigation pattern,convention tillage field indicated greater contents of alkali hydrolysable nitrogen,available phosphorus and organ matter than no tillage field,while no tillage field indicated greater pH value and greater available potassium content.It can be concluded that water irrigation revealed greater impact on soil fertility than soil tillage.
出处
《中国农学通报》
CSCD
北大核心
2010年第23期234-237,共4页
Chinese Agricultural Science Bulletin
基金
广西科学基金项目"不同耕作方式水稻节水栽培及生理生态学研究"(0728062)
广西科学基金重点项目"水稻水气平衡栽培法的生理生态效应及调控研究"(0832008Z)
关键词
水稻
土壤耕作
水分管理
土壤肥力
rice
soil tillage
water irrigation
soil fertility
