稻油免耕复种条件下杂交水稻群体特征研究

A Study on Groups Characteristics of Hybrid Rice under the Condition of No-tillage and Multiple Cropping of Rice and Rape

为了探明稻油免耕复种条件下杂交水稻群体特征的研究规律,于2008年在贵阳以黔南优2058为材料,进行了免耕移栽与翻耕移栽两种栽培方式的田间比较试验研究。结果表明,与翻耕移栽稻相比,免耕有利于叶面积的扩展,免耕移栽稻的粒叶比、茎鞘物质输出率和茎鞘物质转换率、养分的吸收特性、根系氧化力、干物质的积累量、茎叶分配比例和翻耕移栽稻无显著差异;免耕稻的有效穗数为205万/hm2,比翻耕稻低3.54%,免耕稻的结实率、千粒重分别比翻耕稻低7.12%、0.32%,但免耕稻的每穗总粒数比翻耕稻高;免耕稻的实际产量为10 327.8kg/hm2,比翻耕稻低0.99%,但未达到5%的显著差异水平。

To explore the study on groups characteristics of hybrid rice under the condition of no tillage and multiple rice and rape, a comparison experinent with riee cultivar Qingnanyou2058 was conducted under the condition of no tillage and transplan- ted rice and convention tillage and transplanted rice in Guiyang in 2008. The re＇suits showed that compared with conventional tillage and transplanted rice. It is advantageous in increasing the leaf area index higher than that. Its grain--leaf ratio stem, out- put rate of stern and sheath material and stem and sheath material and conversion rate , characteristics of nutrient absorption, root oxidation power, dry matter accumulation and the stem leaf assignment proportion and transplanted transplant the rice not remarkable difference. No--tillage rice effective panicle is 205. 0 × 10^4/ha, It is low 3. 54% than tillage rice, its seed-setting rate and weight is low 7. 12% and 0. 32% than tillage rice, but its the total grains per panicle is higher than tillage rice. Its ac- tual production is 1039.7. 8kg / ha, is low.0. 99% than tillage, but did not reach the 5% level of significant difference.