摘要
于2013、2014年以苏州市相城区望亭镇某河道污泥为研究对象,设计施氮量为120 kg/hm^2(LN)、240 kg/hm^2(NN)2个水平,连续两季种植粳稻品种武运粳24,探讨河道污泥农田施用对水稻不同生育时期磷素含量、吸收、分配和利用效率的影响.结果表明:1施用河道污泥后,水稻不同生育时期植株含磷率显著提高,各生育时期吸磷量显著提高;2施用河道污泥对水稻多数生育时期磷素在茎鞘、叶片和穗中分配比例无显著影响;3施用河道污泥后,水稻不同生育时期磷素干物质生产效率均极显著降低,磷素籽生产粒效率和P素收获指数显著降低;4增施氮肥后,水稻不同生育时期的植株磷素含量和吸磷量均显著或极显著增加,磷素干物质生产效率和籽粒生产效率显著下降;5河道污泥×氮对稻株多数生育时期磷素吸收利用无显著互作效应.综上,施用河道污泥后,水稻植株含磷率、磷素吸收量显著提高,磷素干物质生产效率和籽粒生产效率均显著降低.
This research studied the effects of field application of dredged sludge on rice phosphorus（P） concentration, uptake efficiency and allocation at different growth stages of rice in 2013 and 2014. The dredged sludge was taken from the polluted river of Xiangcheng District in Suzhou. Two levels of N input were arranged as Low N（LN, 120 kg/hm^2） and normal N（NN, 240 kg/hm^2）. The results showed that：（1） compared with AMB, dredged sludge significantly increased P concentration and accumulation in rice.（2） Dredged sludge had no obvious effect on P allocation pattern in stems, leaves or spikes of rice.（3） Dredged sludge resulted in significant decrease in P use efficiency for biomass（PUEp） in all growth stages but decrease of the P use efficiency for grain yield（PUEg） at grain maturity and the harvest index（PHI）.（4） The P concentration and accumulation at different growth stages of rice increased with the N supply（P〈0.05）, but PUEp and PUEg showed the opposite trends.（5） Interactive effects between dredged sludge and N were not observed for P uptake or utilization in rice. In summary, dredged sludge increased P concentration and P uptake, but decreased PUEp and PUEg at different growth stages of rice.
出处
《应用与环境生物学报》
CAS
CSCD
北大核心
2016年第2期332-337,共6页
Chinese Journal of Applied and Environmental Biology
基金
国家"十二五"重大科技支撑计划课题(2012BA D14B12)资助~~
关键词
河道污泥
水稻
磷素吸收
磷素分配
磷素效率
dredged sludge
rice
phosphorus uptake
phosphorus allocation
phosphorus effi ciency
