不同粳稻品种源库关系的研究 Ⅰ.不同粳稻品种的源库特征及类型划分

STUDY ON THE RELATIONSHIP BETWEEN SOURCE AND SINK IN DIFFERENT JAPONICA RICE VARIETIES——I. THE CHARACTERISTICS OF SINK-SOURCE AND DIVISION OF CLASSIFICATION IN DIFFERENT JAPONICA RICE VARIETIES

在田间试验条件下,用剪叶疏花的方法,对辽宁、吉林两省生产上部分水稻主栽品种的源库特征和源库类型进行了初步研究,结果表明:在中等肥力(7.5公斤N/亩)条件下,参试品种可划分为:①增库增产(秀杂、秋光)、②增源增产(辽粳5号、沈农522—3)、③源库互作(S22)、④源库饱和(青系96)4种源库类型。共中类型①品种的结实率、经济系数、产量均最高,类型②品种的结实率和经济系数均最低,但每穗粒数、单位面积颖花量高,其它源库类型品种的结实率和经济系数位于上述两者之间。

<ABSTRACT>Under field experimental condition characteristics and classification between sink and source of several main rice varieties from Liaoning and Jilin province were studied by means of leafcutting and of reducing the number of flowers. The results showed that the varieties tested could be divided into four types on the basis of the sink-source under intermediate level of fertilities (7.Skg N/mu): ① the sink-limited type (Xiu Za and Qiu Guang), ②the source-limited type (Liao Jing 5 and Shen Nong 522-3 ), ③the source-sink-harmonic type (S22), and ④the source-sink saturated type ( Qing Xi 96 ) . Among the four types, varieties within the first type had the highest in seed-setting rate, harvest indexes and yield. Both seed-setting rate and harvest indexes of varieties of the second type were the lowest, although the number of the grains Per panide and the number of flowers per unit area were higher. Seed-setting rate and harvest indexes in the varieties of other types were between those of the first and of the second.