不同种植方式对寒地粳稻干物质积累与茎秆抗折力的影响

The Dramatic Impacts of Different Planting Methods on the Dry Matter Accumulation and the Lodging Resistance of the Japonica Rice Varieties from Cold Zones

以寒地粳稻垦稻12和垦稻31为试验材料,试验采用随机区组设计,应用Richards方程对旱直播(A1)、水稻垄畦栽培(A2)和常规栽培(A3)三种不同的种植方式下的水稻干物质累计过程进行拟合,探讨茎秆基部抗折力、倒伏指数与茎秆主要物理性状的相关性。研究不同种植方式对寒地粳稻干物质积累与茎秆抗折力的影响。结果表明,不同种植方式对垦稻12和垦稻31干物质累积、节间长度、基部第一节间、第二节间的抗折力、弯曲力矩和倒伏指数的影响程度达到显著。对茎秆抗折力和倒伏指数与茎秆主要物理性状间的相关特征分析表明,茎秆抗折力和倒伏指数受茎秆多个物理特性的影响,主要与茎秆基部节间长度、节间充实度等关系密切。

This experiment takes The Kendao-12 and Kendao-31 are taken as materials in the experiment,and adopts the randomized-block design.Richards functions is used to fit the Dry matter process of rice on the effects of the direct seeding in dry land(A1),ridge cultivation(A2)and conventional cultivation(A3)on the dry matter accumulation,transport and lodging resistance of rice.In addition,the correlation between the rupture resistance and lodging index of the stalk base and the main physical properties of the stalk was discussed.The effects of different planting patterns on the internode length,the rupture resistance of the first and second internodes on the base,the bending moment and the lodging index were significant.The analysis of the correlation between the rupture resistance,as well as the lodging index and the main physical properties of the stalk indicated that,affected by several physical characteristics of the stalks,the rupture resistance and lodging index of the stalk were closely related to the internode length,and internode plumpness of the stalk base.