PHOTOSYNTHESIS, CROP GROWTH, AND RESPIRATION OF A TALL AND SHORT RICE VARIETIES

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概要

• 論文の詳細を見る

• The crop growth rate (CGR) of IR8 and Peta increased as leaf area index (LAI) increased up to certain values. Beyond these values, the CGR was almost constant. The plateau value of CGR was greater for IR8 than for Peta. The respiration of the crop for both varieties did not increase linearly but asymptotically with increase in LAI. The gross photosynthesis was estimated from (CGR×0.9)+respiration. The gross photosynthesis of both varieties increased with increasing LAI up to about 6,then showed little further increase. The maximum gross photosynthesis of IR8 was greater than that of Peta. The respiration of both varieties was approximately 40 percent of gross photo-synthesis over a wide range of values for LAI and leaf area ratio. The similar relationship was also found for 6 varieties of different plant type. These data suggest that the balance between photosynthesis and respiration is relatively stable over a broad range of photosynthetic rates for all varieties tested. Thus, it is unlikely that optimum LAI occurs due to an imbalance between photo-synthesis and respiration. An optimum LAI value may occur when heavy application of nitrogen markedly increases the droopiness of leaves at high LAI values, thereby decreasing gross photosynthesis.

• 社団法人日本土壌肥料学会の論文

著者

• Yoshida Shoichi

  The Institute Of Space And Astronautical Science (isas)

• COCK James

  The International Rice Research Institute

関連論文

• GRAIN-FILLING CHARACTERISTICS OF RICE VARIETIES (Oryza sativa L.) DIFFERING IN GRAIN SIZE UNDER CONTROLLED ENVIRONMENTAL CONDITIONS
• EFFECT OF WATER STRESS ON GRAIN FILLING IN RICE
• ZINC DEFICIENCY OF THE RICE PLANT IN CALCAREOUS SOILS
• THE ACCUMULATION PROCESS OF CARBOHYDRATE IN RICE VARIETIES IN RELATION TO THEIR RESPONSE TO NITROGEN IN THE TROPICS
• PHOTOSYNTHESIS, CROP GROWTH, AND RESPIRATION OF A TALL AND SHORT RICE VARIETIES

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