播种量和秧龄对钵苗机插杂交籼稻秧苗素质的影响

Effects of Sowing Rate and Seedling Ages on the Quality of Seedling with Bowl Mechanicaltransplanting Method

以杂交籼稻C两优华占为试验材料,研究了播量和秧龄对钵苗机插水稻秧苗素质的影响。结果表明,随着秧龄的降低,苗高、叶挺高和根冠比呈降低趋势,叶龄、茎基宽、总根长、根表面积、根分支数和根尖数呈先降低后升高趋势,叶面积和根平均直径呈先增加后降低趋势,而重高比呈上升趋势。随着播量的增加,苗高、叶龄和叶挺高均呈先降低后升高趋势,茎基宽、地上部干质量和重高比、总根长、根表面积、根平均直径和根分支数均呈降低趋势,而根冠比呈先上升后下降趋势。通过隶属函数值分析结果得出,秧龄为55d和播种量为每孔2粒处理下秧苗综合质素表现最优。

The effects of sowing rate and seedling age on the quality of seedling were studied by using indica hybrid rice C Liangyouhuazhan as experimental material. The results showed that with the decrease of seedling age, seedling height, leaf height and root-shoot ratio decrease, leaf age, stem base width, total root length, root surface area, root branch number and root tip number decrease first and then increase. The leaf area and root mean diameter increased first and then decreased, while the weight-to-height ratio showed an upward trend. With the increase of sowing rate, the seedling height, leaf age and leaf height decreased first and then increased, the stem width, dry weight and weight-to-height ratio, total root length, root surface area, root mean diameter and root branch decreased. While the root-shoot ratio increased first and then decreased. According to the results of subordinate function value analysis, the comprehensive quality of the seedlings of 55 d and the seeding rate 2/hole was the best treatment.