优质稻SRI本土化研究及其物质生产特性分析

以中国水稻研究所＂水稻强化栽培关键技术＂为参考,结合广西优质稻高产栽培技术,初步拟定了一套广西优质稻SRI本土化技术方案,以优质常规稻新品种＂力源占1号＂为试验材料,以常规栽培方法为对照,设S-1（30cm×30cm,11.25万穴/ha）、S-2（23cm×20cm,21.45万穴/ha）2个种植密度,对各处理的茎蘖动态、叶面积指数、干物质积累以及丙二醛（MDA）、脯氨酸（Pro）含量等生理生化指标进行测定,并对各处理的经济性状进行调查分析。结果表明,在该技术体系下每穴最高分蘖、成穗率、每穴有效穗数、每穗粒数、每穴穗重,及各时期每穴干物质重均显著高于常规栽培;同时该技术方案省时省工,适当延长了水稻的生育期,能极大发挥植株个体的生长潜力,提高水稻的抗旱能力,在适宜的种植密度条件下能很好地协调个体与群体之间的矛盾,达到显著的增产效果。

Analysis on system of rice intensification (SRI) localization and dry matter production characteristics of high-quality rice

System of rice intensification（SRI） is a new theory of rice high-yield cultivation,proposed by scientists of Madagascar and America.This system is characterized by high yield potential,seed and water saving techniques and introduced in China in 1999.In the present study,by combining the key techniques of rice intensification cultivation（proposed by China National Rice Research Institute） and high-yield cultivation techniques of high-quality rice in Guangxi,a preliminary localization SRI technique was developed,using a new conventional quality variety Liyuanzhan 1 as the test material.Two planting density,viz.,S-1（30cm×30cm,11.25×104/ ha） and S-2（23cm×20cm,21.45×104/ ha）were used and the physiological and biochemical indexes viz.,proline content and MDA content in leaf,dry matter accumulation,leaf area index,the tiller dynamics and some other parameters measured,and economic traits of each treatment were surveyed.The conventional cultivation technique was used as the control.The results showed that,under this preliminary intensification system,the maximum tiller number,ear-bearing percentage,effective panicle number per hole,grains per panicle,grain weight per hole and dry weight per hole were higher comparing to conventional cultivation treatment.Further,this technique could save time and labor cost,prolong the growth period of rice,release the vast growth potential of the rice plant and improve the drought resistance capacity of rice plant.Moreover,the yield of rice was increased significantly due to contradiction between individual rice and its population were well coordinated with suitable planting density.