Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2020, Vol. 36 ›› Issue (17): 7-15.doi: 10.11924/j.issn.1000-6850.casb20200100062

Special Issue: 小麦 水稻

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Photosynthetic Material Production, Accumulation and Transport Characteristics of Different Photosynthetic Efficiency Wheat Population in Rice-Wheat Rotation

Wang Yan, Xu Jun, You Rui, Zhu Min, Zhu Xinkai, Guo Wenshan()   

  1. Jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops/Wheat Research Institute, Yangzhou University, Yangzhou Jiangsu 225009
  • Received:2020-01-19 Revised:2020-03-19 Online:2020-06-15 Published:2020-06-09
  • Contact: Guo Wenshan E-mail:wheat@yzu.edu.cn

Abstract:

To construct high photosynthetic efficiency wheat population after rice in central Jiangsu, a field experiment was carried out taking wheat variety ‘Yangmai23’ as material to investigate photosynthetic material production, accumulation and transport characteristics of different photosynthetic efficiency wheat populations with cluster analysis. The results showed that: the yield, harvest index, photosynthetic potential, dry matter accumulation after anthesis and high efficiency leaf area ratio at flowering stage had significant differences among different wheat populations. Compared with the low and medium photosynthetic efficiency population, high photosynthetic efficiency population had higher yield and photosynthetic potential, and high efficiency leaf area ratio at flowering stage and dry matter accumulation. The harvest index of the medium photosynthetic efficiency population was significantly lower than that of the high and the low photosynthetic efficiency population. For yield components, wheat population with high photosynthetic efficiency had higher panicle number and thousand grain weight, meanwhile, the photosynthetic characteristics of high photosynthetic efficiency population and its flag leaves had good performance at flowering stage. After sowing and in rainy winter, the suitable combinations of Yangmai23 to construct high photosynthetic efficiency wheat population after rice in central Jiangsu were 225×104 plants/hm2, 270 kg N/hm2, the proportion of 7:1:2:0 (basal: tillering: jointing: booting fertilizer) and 300×104 plants/hm2, 330 kg N/hm2, the proportion of 5:1:2:2. The yield of these two combinations could reach 8400 kg/hm2.

Key words: wheat in rice-wheat rotation, high photosynthetic efficiency population, density, nitrogen fertilizer, utilization of light energy

CLC Number: