不同施肥处理对谷子光合特性及产量的影响

doi:10.12190/j.issn.2096-1197.2022.05.05

Abstract

Abstract:

【Objective】To find the optimal fertilization method through research on the diurnal variation of millet′s photosynthetic properties throughout the filling stage. To provide a reference for improving the production and industrial growth of side crops in Ordos City，Inner Mongolia.【Methods】In the test site at Shagedu，Junggar Banner，using Jinmiao K1 as test variety，five fertilization treatments were set up：phosphorus and potassium fertilizer（PK，blank），nitrogen-phosphorus and potassium fertilizer（NPK，control），replacing 20% of the total nitrogen application with sheep manure（N+SM），replacing 20% of the total nitrogen application with bio-organic fertilizer（N+BM），and replacing 20% of the total nitrogen application with slow-release compound fertilizer（N+HM）. The membrane side planting was used to analyse the differences in millet leaf area，diurnal variations in photosynthetic properties during filling stage and yield.【Results】The leaf area of Jinmiao K1 in N+BM treatment was higher than that in other treatments after jointing stage. The diurnal variation of net photosynthetic rate of different treatments showed bimodal curve change and had photosynthetic midday break. The net photosynthetic rate of N+BM treatment was the highest at 17.5 μmol/（m²·s）. The highest transpiration rate of each treatment appeared from 12：00 to 14：00. The diurnal variation of intercellular CO₂ concentration showed a‘V’ shaped trend. The intercellular CO₂ concentration in N+BM treatment was the lowest at 39.2 mmol/（m²·s）. The stomatal conductance and net photosynthetic rate of each treatment had the same trend with the lowest value appeared from 12：00 to 14：00. At 12：00，the stomatal conductance of N+BM treatment was 33.3% lower than that of NPK treatment. The net photosynthetic rate was significantly positively correlated with the transpiration rate，and extreme significantly positively correlated with stomatal conductance. The grain yield of N+BM treatment reached 5 122 kg/hm²，which was 16.2% higher than that of NPK treatment.【Conclusion】Replacing 20% of the total nitrogen application with bio-organic fertilizer improved the photosynthetic capacity and dry matter accumulation capacity of millet in the later stage，increased yield，was a suitable fertilization method in Ordos City.

Key words: Millet, Photosynthetic indexes, Diurnal variation, Fertilization treatments, Yield

CLC Number:

S515

ZHANG Biao, ZHAO Peiyi, REN Yongfeng, ZHANG Peng, GAO Hongyan, HAN Yunfei, DU Erxiao, LUO Suju, WANG Xuanming. Effects of different fertilization treatments on photosynthetic characteristics and yield of millet[J].Journal of Northern Agriculture, 2022, 50(5): 34-40.

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URL: https://journal30.magtechjournal.com/bfnyxb/EN/10.12190/j.issn.2096-1197.2022.05.05

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Effects of different fertilization treatments on photosynthetic characteristics and yield of millet

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