稻蟹种养不同模式光合效率及综合效益分析

Analysis on Photosynthetic Characteristics and Economic Benefits of Rice Crab Cultivation in Different Modes

为探明不同栽植模式杂交粳稻群体产量、光合特征及经济效益的变化,于2019年在辽宁省盘锦市、东港市进行大田试验研究,以杂交粳稻辽优9906为试验材料,设置3种高光效栽植模式和1种当地常规栽植模式,分析了不同栽植模式下2个生态区的水稻产量、光合特征和稻田经济效益。结果表明:宽窄行栽植模式可在保障有效穗数的基础上提高40 cm、60 cm冠层透光率,优化光合参数,实现水稻高产;而12比空栽植模式可优化河蟹栖息环境,增加河蟹产出量,提高综合经济效益。12比空栽植模式在高产生态区盘锦试验点在保证水稻产量的基础上,增加河蟹产出量提升综合收益,宽窄行在东港试验点在稳定河蟹产出量基础上增加水稻产量提升综合收益。

In order to explore the changes of yield,photosynthetic characteristics and economic benefits of japonica hybrid rice under different cultivation modes,field experiments were conducted in Panjin and Donggang cities of Liaoning Province in 2019.Three high light efficiency cultivation modes and one local conventional cultivation mode were set up with japonica hybrid rice Liaoyou 9906 as experimental material.The rice yield,photosynthetic characteristics and paddy field economy of two ecological regions under different planting modes were analyzed.The results showed that the wide narrow row cultivation mode could improve the light transmittance of 40 cm and 60 cm canopy,optimize the photosynthetic parameters and achieve high yield of rice on the basis of ensuring the productive panicle number,while the planting mode of"planting 12 ridges and empty 1 ridge"can optimize the habitat of river crab,increase the output of river crab and improve the comprehensive economic benefits.In the high yield ecological region,Panjin experimental site increased the yield of river crab and enhanced the comprehensive income by ensuring the rice yield.The planting mode of"alternately planting of broad line and narrow line"increased rice yield and comprehensive income on the basis of stabilizing crab output in Donggang experimental site.