ACTA AGRICULTURAE BOREALI-SINICA ›› 2021, Vol. 36 ›› Issue (S1): 222-230. doi: 10.7668/hbnxb.20192472

Special Issue: Rice Soil fertilizer

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

Deep Base Fertilizer Application Affects Direct Seeding Rice Yield and Fertilizer Utilization

DONG Linlin1, SHEN Mingxing2, QUAN Jianyu3, WEN Yuqin4, SHEN Yuan1, TAO Yueyue1, SHI Linlin1, LU Changying1   

  1. 1. National Agricultural Experimental Station for Soil Quality, Suzhou Academy of Agricultural Sciences, Suzhou 215106, China;
    2. Suzhou Country Cadre Institute, Suzhou 215000, China;
    3. Taicang Agricultural Technology Extension, Taicang 215400, China;
    4. Agricultural and Rural Work Bureau of Shaxi Town, Taicang 215421, China
  • Received:2021-06-28 Published:2021-12-28

Abstract: To explore the effects of basic application depth of chemical fertilizer on its utilization rate, rice growth and nutrient uptake. Five treatments including no fertilization(T1), and basal fertilizer application depth of 0(T2), 5(T3), 10(T4)and 15 cm(T5)were set up to study the effects of basal fertilizer application depth on rice yield and fertilizer use efficiency. The application depth of basal fertilizer had no significant effect on the leaf biomass of rice at different growth stages, but had significant effect on the stem biomass at mature stage. The stem biomass was significantly increased when the basal fertilizer was applied at 0 and 5 cm depth, and significantly decreased at fertilizer application depth of 10 cm and 15 cm at mature stage, and significantly lower than that of basal fertilizer application on soil surface(P<0.05);The uptake of N, P, K of rice leaf at different growth stages changed not significantly with basal fertilizer application depth, but the N, P and K uptake of rice stem at mature stage was significantly different due to basal fertilizer application depth(P<0.05);The N and K harvest index increased to the maximum at fertilizer application depth about 10 cm and the decreased, and was significantly correlated with basal fertilizer application depth(P<0.05). The application depth of base fertilizer with the largest nitrogen harvest index was 10.5 cm, while which of the largest potassium harvest index was 7.0 cm. The effect of basal fertilizer application depth on rice stem growth and nutrient absorption was greater than that on rice leaf. Basal fertilizer applied within an appropriately depth had positive effects on rice yield and fertilizer use efficiency. Considering the rice yield and element utilization, the depth of basal fertilizer applied within 7.0-10.5 cm was more conducive to improve the rice yield and fertilizer utilization.

Key words: Direct seeding rice, Fertilizer application depth, Harvest indicator, Fertilizer utilization

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Cite this article

DONG Linlin, SHEN Mingxing, QUAN Jianyu, WEN Yuqin, SHEN Yuan, TAO Yueyue, SHI Linlin, LU Changying. Deep Base Fertilizer Application Affects Direct Seeding Rice Yield and Fertilizer Utilization[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2021, 36(S1): 222-230. doi: 10.7668/hbnxb.20192472.

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