水肥调控对水稻植株不同部位磷素含量及分配的影响  

Effects of Water and Fertilizer Managements on Content and Distribution of Phosphorus in Different Parts of Rice Plants

作　　者：庞桂斌[1] 彭世彰[1] 张杰[1] 张黎明 金小平 

机构地区：[1]河海大学水文水资源与水利工程科学国家重点实验室,江苏南京210098 [2]昆山市水利技术推广站,江苏昆山215300

出　　处：《节水灌溉》2009年第12期1-4,11,共5页Water Saving Irrigation

基　　金：国家自然科学基金重点项目(50839002);国家高技术研究发展计划("863"计划项目)(2006AA100202);优秀博士学位论文作者专项基金(200546)

摘　　要：根据田间试验资料,分析了水稻植株的含磷量、磷素累积量以及不同部位的磷素分配。结果表明:两种灌溉方式下,与农民习惯施肥(FFP)相比,控制灌溉条件下实地氮肥管理(SSNM)提高了水稻叶片含磷量,生育后期叶片磷素累积量仍保持在较高的水平。同时在拔节孕穗期提高了茎鞘和根系含磷量,茎鞘磷素累积量有所上升。乳熟期SSNM处理水稻穗部含磷量高于FFP处理。两种施肥方式下,与淹水灌溉相比,控制灌溉降低了水稻叶片、茎鞘含磷量,但是在拔节孕穗期SSNM处理下控制灌溉提高了水稻根系含磷量,到了生育后期磷素累积量有所反弹,抽穗开花期控制灌溉水稻穗部含磷量显著高于淹水灌溉。水肥联合分析显示,控制灌溉与实地氮肥管理联合调控促进磷素向生长中心转移,提高了磷素的利用效率。Based on the data from field experiments, the phosphorus content and phosphorus accumulation of rice plants were ana lyzed, and phosphorus distributions in different parts of rice were studied as well. The results showed that compared with farmers＇ fertilization practice （FFP）, site-specific nutrient management （SSNM） increased the phosphorus content of leaf under controlled ir rigation, and the phosphorus accumulation of leaf was high in the end. At the same time, the phosphorus content of stem ＆ sheath and roots were enhanced at jointing and booting stage, and the phosphorus accumulation of stem ＆. sheath was increased as well. Also phosphorus content of panicle was higher than FFP at milk maturity stage. Compared with flooding irrigation, controlled irrigation reduced the phosphorus content of leaf and stem ＆ sheath. However, the phosphorus content of roots were improved with SSNM at jointing and booting stage, and the phosphorus accumulation under controlled irrigation condition recuperated at milk maturity stage. The phosphorus accumulation of panicle was higher under water saving irrigation condition. Water and fertilizer managements promote phosphorus transferring under controlled irrigation and SSNM condition, and the phosphorus efficiency was improved as well.

关 键 词：水肥调控 控制灌溉 实地氮肥管理 水稻 含磷量 磷素累积量 分配 

分 类 号：S274.1[农业科学—农业水土工程] S147.3[农业科学—农业工程]