ACTA AGRICULTURAE BOREALI-SINICA ›› 2020, Vol. 35 ›› Issue (5): 81-88. doi: 10.7668/hbnxb.20191187

Special Issue: Oil crops Hot Article

• Tillage and Cultivation·Physiology and Biochemistry • Previous Articles     Next Articles

Effects of Waterlogging at Full Flowering Stage on Nitrogen Accumulation and Distribution of Sesame Cultivars with Different Waterlogging Tolerance

LI Guoqiang1,2, ZHANG Jiantao1,2, HU Feng1,2, ZHOU Meng1,2, CHEN Dandan1,2, ZHENG Guoqing1,2   

  1. 1. Agricultural Economy&Information Research Institute, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China;
    2. Henan Engineering and Technology Research Center for Intelligent Agriculture, Zhengzhou 450002, China
  • Received:2020-05-18 Published:2020-10-28

Abstract: The purpose of this study was to explore the effect of waterlogging at full flowering stage on the characteristics of nitrogen uptake in sesame cultivars with different waterlogging tolerance. The pot experiment was comprised of two sesame cultivars (Zhengzhi 13 and Zheng 98N09) and four waterlogging regimes (waterlogging for 0, 12, 24 and 36 h) in a completely randomized design. The results showed that for Zhengzhi 13 and Zheng 98N09, the N content of stem and capsule shell decreased gradually, while the N content of leaves increased gradually and reached the maximum value at 40 days after emergence and then decreased gradually. The N accumulation of stem, leaf and capsule shell increased at first, reaching the maximum at 61 days of emergence, and then decreased. The N accumulation per plant of two varieties went up gradually with increasing plant age. At 61 and 90 days after emergence, the stem N content of W12h, W24h and W36h in two varieties was higher than that of CK, but the N content of leaf and capsule shell was lower than that of CK. At 61 and 90 days after emergence, the stem N accumulation in both Zhengzhi 13 and Zheng 98N09 followed in the order of W12h > W24h > CK > W36h, whereas the N accumulation of leaves, capsule shell and single plant followed in the order of CK > W12h > W24h > W36h. At maturity, the N accumulation of stem, leaves, capsule shell, grain and single plant differed significantly in effect of waterlogging on Zhengzhi 13 and Zheng 98N09. Moreover, the distribution ratio of each organ, except capsule shell of Zhengzhi 13, also had a significant difference. Under normal growth conditions (CK), the distribution ratio of grain N was the largest in both Zhengzhi 13 (51.29%) and Zheng 98N09 (53.04%), and that of capsule shell N was higher than that of stem and leaves. the waterlogging index of leaves, capsule shell, grain and single plant rise gradually with increasing waterlogging duration. Among the four organs of two varieties, the effect of waterlogging on leaves was more than on grain and single plant. At the waterlogging duration, the waterlogging index of leaf and capsule shell in Zheng 98N09 was lower than in Zhengzhi 13. In summary, waterlogging at full flowering increased the stem N content, and decreased the leaf N content and capsule shell, and also reduced the N accumulation of organs and single plant at maturity. With increasing waterlogging duration, the distribution ratio of stem and grain increased, whereas that of leaf and capsule shell decreased. The waterlogging index of each organ and single plant of sesame increased gradually with increasing waterlogging duration. The waterlogging index of leaf and capsule shell was higher than that of stem and grain. There were great genotypic differences in the effects of waterlogging on nitrogen absorption, accumulation and distribution and it turned out that Zheng 98N09 (tolerant) was better than Zhengzhi 13 (sensitive).

Key words: Sesame, Full flowering stage, Waterlogging, Accumulation and distribution of nitrogen, Waterlogging index

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Cite this article

LI Guoqiang, ZHANG Jiantao, HU Feng, ZHOU Meng, CHEN Dandan, ZHENG Guoqing. Effects of Waterlogging at Full Flowering Stage on Nitrogen Accumulation and Distribution of Sesame Cultivars with Different Waterlogging Tolerance[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2020, 35(5): 81-88. doi: 10.7668/hbnxb.20191187.

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