稻鸭共育对水稻生长后期农艺性状及产量的影响

为探讨稻鸭共育模式下水稻生长后期地上部农艺性状和籽粒灌浆动态的变化,设置稻鸭共育(RD)、常规水稻栽培(RH)和不施任何药剂栽培水稻(CK)的对比试验,研究水稻生长后期地上部农艺性状的动态变化及产量形成.结果表明:RD和RH处理的水稻分蘖、地上部干物质积累、剑叶叶片SPAD值、根伤流液、籽粒灌浆和产量均优于CK处理.与RH处理相比,RD处理降低了水稻分蘖的峰值,两者相差0.45,保持分蘖中后期水稻分蘖数的稳定;增加水稻地上部干物质的积累量,增幅为4.20%~16.42%,齐穗期和成熟期达到显著性差异;水稻生长后期维持剑叶叶片SPAD值和根伤流液在较高的水平,利于水稻籽粒充实度和粒重的增加,从而有利于水稻产量的增加.

Effect of Rice-Duck Farming on Agronomic Characters and Yield in the Late Growth Stage

This paper is aimed at studying the changes of agronomic traits and grain grouting in the late growth stage of rice under rice - duck cultivation. A contrast experiment is taken, which includes rice - duck cultivation .conventional rice cultivation, and fertilizer - free rice cultivation.The dynamic changes of agronomic traits and yield are studied. The results show that RD and RH see higher tiller,dry matter accumulation oveiground,SPAD value of blade.root bleeding sap fluid, grain grouting and yield than CK. RD sees a 0.45 smaller tiller peak value than RH and has stable tiller in the middle and late stages. It has 4. 20% to 16.42% more dry matter accumulation,reaching a significant difference at the heading stage and ripening stage. The SPAD value of blade and the amount of root bleeding sap fluid of RD at the late growth stage are kept at a high level .facilitating the increase of grain plumpness .grain weight.and the rice yield.