Case Studies on High Yields of Paddy Rice in Jiangsu Province, China : II. Analysis of characters related to lodging

Japanese Journal of Crop Science

Hidehiko TANAKA¹  Qingsen ZHU¹  Takahisa AMANO¹  Yulong WANG¹  Naoto INOUE¹ 

关键词: Breaking resistance;    挫折抵抗;    China;    水稲;    High yield;    汕優63号;    Lodging index;    多収穫;    Paddy rice;    中国;    Shan You 63.;    倒伏指数.;   

DOI  :  10.1626/jcs.62.275

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

To clarify lodging resistance of high yield examples, characters related to lodging of Shan You 63 (F1 hybrid rice) with 965 gm-2 of a brown rice weight were analyzed. There were various factors for early lodging regarding external morphological characters. The lodging index (a distance between fulcra in 5 cm) at the 4th internode from the top (N4) at maturity was more than 200. High yield of Shan You 63 was obtained under quite dangerous conditions as regards lodging. The reason for increase in the lodging index at N4 was low breaking resistance. This phenomenon could be explained by a high rate of translocation of non-structural carbohydrate (NSC) and total nitorogen (N) from the culm and leaf to ear, and an extreme decrease in dry weight per unit length of the portion lower than N4 at maturity. To consistently obtain a yield exceeding 965 gm-2 in Shan You 63, it is necessary to develop cultivation techniques to store more NSC, N and dry matter in the culm and leaf sheath and ear.

【 授权许可】

Unknown