ACTA AGRICULTURAE BOREALI-SINICA ›› 2019, Vol. 34 ›› Issue (3): 155-163. doi: 10.7668/hbnxb.201751226

Special Issue: Rice Soil fertilizer

• Resource and Environment·Plant Protection • Previous Articles     Next Articles

Effects of Different Nitrogen Application Patterns on Leaf Physiological Characteristics and Grain Yield of Double Cropping Rice

XU Yilan, FU Aibin, LIU Tangxing   

  1. Hunan Biological and Electromechanical Polytechnic, Changsha 410127, China
  • Received:2018-12-18 Published:2019-06-28

Abstract: In order to investigate the physiological and biochemical characteristics of rice leaves and grain yield with different N application patterns in double-cropping rice system, the protective enzyme activities and photosynthetic characteristics of rice leaves, grain yield of early rice and late rice were analyzed under 5 models of N application:120.0 kg/ha of early rice plus 210.0 kg/ha of late rice(N120:210), 150.0 kg/ha of early rice plus 180.0 kg/ha of late rice(N150:180), 180.0 kg/ha of early rice plus 150.0 kg/ha of late rice(N180:150), 210.0 kg/ha of early rice plus 120.0 kg/ha of late rice(N210:120), and taking zero N of early and late rice as the control(CK). The results showed that the activities of SOD, POD and CAT in rice leaves increased with different N fertilizer treatments compared to CK at main growth stages of early and late rice. Meanwhile, compared with CK, the MDA and Pro contents in rice leaves decreased with different N fertilizer treatments at main growth stages of early and late rice. The Pn and Tr of rice leaves with different N fertilizer treatments decreased in the following order:N150:180 > N180:150 > N210:120 > N120:210 > CK and N150:180 > N180:150 > N120:210 > N210:120 > CK at main growth stages of early and late rice, respectively. Meanwhile, the leaf Gs of early and late rice with different N fertilizer treatments decreased in the following order N210:120 > N180:150 > N150:180 > N120:210 > CK and N120:210 > N150:180 > N180:150 > N210:120 > CK at main growth stages, respectively. The results also indicated that there were no significantly difference in spikelet number per panicle and 1 000-grain weight of rice among different N fertilizer treatments. The grain yields of early rice and late rice in N150:180 and N180:150 treatments were higher than in other treatments. Compared with CK, the grain yields of early rice and late rice in N150:180 and N180:150 treatments increased by 1 849.5, 1 879.5 kg/ha, respectively. The results indicated that the N150:180 treatment could improve the protective enzyme activities and photosynthetic characteristics of rice leaves, so as to increase the grain yield of rice.

Key words: Rice, Nitrogen application patterns, Physiological and biochemical characteristics, Protective enzyme, Yield

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Cite this article

XU Yilan, FU Aibin, LIU Tangxing. Effects of Different Nitrogen Application Patterns on Leaf Physiological Characteristics and Grain Yield of Double Cropping Rice[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2019, 34(3): 155-163. doi: 10.7668/hbnxb.201751226.

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