&ldquo;Double Late&rdquo; Cultivation Model&nbsp; for Rice and Wheat and Its Comprehensive Evaluation on Annual Productivity

GONG  Jinlong1 , ZHANG   Hongcheng1, * , CHANG   Yong1 , HU   Yajie1 , LONG   Houyuan1 , DAI   Qigen1 , HUO   Zhongyang1 , XU  Ke1 , WEI   Haiyan1 , LI   Dejian2 , SHA  Anqin2 , ZHOU   Youyan2 , LUO  Xuechao2

doi:10.3969/j.issn.10017216.2011.06.010

Chinese Journal OF Rice Science >

2011 , Vol. 25 >Issue 6: 629 - 638

DOI: https://doi.org/10.3969/j.issn.10017216.2011.06.010

Research Papers

“Double Late” Cultivation Model for Rice and Wheat and Its Comprehensive Evaluation on Annual Productivity

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¹ Innovation Center of Rice Cultivation Technology in the Yangtze River Valley, Ministry of Agriculture/Key Laboratory of Crop Genetics and Physiology of Jiangsu Province, Yangzhou University, Yangzhou 225009, China; ² Agricultural Bureau of Xinghua County, Jiangsu Province, Xinghua 225700, China;

Received date: 2011-02-22

Revised date: 2011-06-22

Online published: 2011-11-10

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Abstract

Effects of “double late” (latematurity rice and latesowing wheat) cultivation model on annual productivity of rice and wheat were systematically studied in a field experiment with four cultivation model treatments. Results showed that with the crop rotation being delayed, annual grain yield of rice and wheat increased. Grain yield of rice increased, whereas the grain yield of wheat increased firstly and then decreased with the highest yield under latematurity medium japonica rice+wheat model (LMW). Moreover, prolonging rice growth duration and developing large panicles improved annual grain yield of rice and wheat. With maturity being prolonged, productivity with respect to the key inputs of rice increased. But for wheat, productivity per unit of seed decreased and others increased firstly and then decreased with the best performance under LMW model. Appropriate sowing date helped improve productivity with respect to key inputs, while appropriately delayed crop rotation was awarding to annual economic productivity of rice and wheat. Additionally, the concept of “double late” cultivation model and its regulation approaches were discussed.

Key words： double late cultivation; rice; wheat; annual productivity

Cite this article

GONG Jinlong1 , ZHANG Hongcheng1, * , CHANG Yong1 , HU Yajie1 , LONG Houyuan1 , DAI Qigen1 , HUO Zhongyang1 , XU Ke1 , WEI Haiyan1 , LI Dejian2 , SHA Anqin2 , ZHOU Youyan2 , LUO Xuechao2 . “Double Late” Cultivation Model for Rice and Wheat and Its Comprehensive Evaluation on Annual Productivity[J]. Chinese Journal OF Rice Science, 2011 , 25(6) : 629 -638 . DOI: 10.3969/j.issn.10017216.2011.06.010

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