ACTA AGRICULTURAE BOREALI-SINICA ›› 2021, Vol. 36 ›› Issue (4): 132-138. doi: 10.7668/hbnxb.20192298

Special Issue: Cotton Drought and water saving Hot Article

• Resources & Environment·Plant Protection • Previous Articles     Next Articles

Effects of Water and Planting Density on Nitrogen Accumulation, Distribution and Yield of Cotton

XIAO Zhenlei1, LI Hui1, LIU Liantao1, ZHANG Yongjiang1, BAI Zhiying2, ZHANG Ke1, SUN Hongchun1, LI Cundong1   

  1. 1. College of Agronomy, Hebei Agricultural University, State Key Laboratory of North China Crop Improvement and Regulation, Key Laboratory of Crop Growth Control of Hebei Province, Baoding 071000, China;
    2. College of Life Sciences, Hebei Agricultural University, Baoding 071000, China
  • Received:2021-04-20 Published:2021-08-28

Abstract: In order to explore the effects of water and planting density on nitrogen use efficiency of cotton, a field experiments was carried out in Qingyuan Experimental Station of Agricultural University of Hebei between 2019 and 2020. Nongdamian 601 was taken as the experimental material, and two-factor split zone experiment was adopted, with water treatment as the main area:W1(60%-70% soil relative water content) and W2(40%-50% soil relative water content), the secondary areas were planting densities D6(60 000 plants/ha), D9(90 000 plants/ha) and D12(120 000 plants/ha). The nitrogen accumulation, distribution and yield of cotton organs under different water and planting densities were measured.The results showed as follows:Under different water treatments, the total nitrogen accumulation and reproductive organs in cotton was the highest under high density condition, and the trend was consistent during the two years. Compared with the drought treatment, the nitrogen accumulation and total nitrogen accumulation in the reproductive organs of the control group were significantly increased, but there was no significant difference in the proportion of nitrogen distribution in the reproductive organs among different water treatments. The yield of seed cotton increased with the increase of planting density.Under the same density treatment, the seed cotton yield under the drought condition in 2019 was 13.74% lower than that of the control group, and the seed cotton yield under the drought condition in 2020 was only 2.54% lower.Correlation analysis showed that the accumulation and distribution of nitrogen in various organs of cotton were significantly positively correlated with the yield of seed cotton and boll number per unit area.In conclusion, reducing irrigation amount and increasing planting density(90 000-120 000 plants/ha) are effective ways to save water and increase nitrogen uptake in local cotton.

Key words: Cotton, Water saving, Yield, Plant density, Nitrogen accumulation

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Cite this article

XIAO Zhenlei, LI Hui, LIU Liantao, ZHANG Yongjiang, BAI Zhiying, ZHANG Ke, SUN Hongchun, LI Cundong. Effects of Water and Planting Density on Nitrogen Accumulation, Distribution and Yield of Cotton[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2021, 36(4): 132-138. doi: 10.7668/hbnxb.20192298.

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