Quantitative Analysis on Biomass and Net Primary Productivity of Aboveground Parts in Rice

Abstract

Abstract: There are few quantificational reports about the net primary productivity（NPP）and biomass in rice so far. As the uppermost food supplies crop, it is very necessary to know the net primary productivity and biomass of rice. The results according to the datum of early rice agrometeorological oberservation of 1996-2005 show that the order NPP during different rice growth period is 3.65±1.36g/m²·d at sowing to third leaf seedling stage, 14.34±15.18g/m²·d at third leaf seedling to transplanting stage, 2.98±1.79g/m²·d at transplanting to tillering, 12.11±4.37g/m²·d at tillering to elongation stage, 19.35±4.66g/m²·d at elongation to heading stage, 29.89±13.71g/m²·d at heading to milky ripening stage, 8.81±11.51g/m²·d at milky ripening to ripening stage. The NPP of rice is higher than most other plants. The biomass of rice is 75.14±31.49g/m² at third leaf seedling stage, 156.84±48.99g/m² at transplanting stage, 5.48±2.50g/m² after transplanting stage, 45.53±29.39g/m² at tillering stage, 213.11±54.78g/m² at elongation stage, 567.83±117.87g/m² at heading stage, 889.70±173.99g/m² at milky ripening stage, 1018.00±147.60g/m²at ripening stage. The biomass gradually increases with the growth of rice. The significant linear correlation exists the NPP and leaf area index.

CLC Number:

S511

Wang Shangming, Zhang Chonghua, Hu Fengxi, Zeng Kai, Zhang Wenhong, Wang Wenjin. Quantitative Analysis on Biomass and Net Primary Productivity of Aboveground Parts in Rice[J]. Chinese Agricultural Science Bulletin, 2008, 24(8): 201-205.

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