The Effect of Controlled-release Coated Urea on Wheat Yield and Apparent N Recovery Rates

doi:10.7668/hbnxb.2008.S1.047

Abstract

Abstract: Field plot experiments were conducted to investigate the effects of controlled-releases coated urea on wheat yield and apparent N recovery rates. The yields and apparent N recovery rates of 30% urea, 35% coated urea with releasing time in 90 d and 35% coated urea with releasing time in 120 d mixed application (F₂) were the best. Compared with 40% basal to 60% top dressing urea applied at jointing stage (F₁), the yields and apparent N recovery rates of F₂increased by 5. 36% - 7. 16% and 13. 03% - 16. 72%, respectively. From 0- 40 cm depth of soil, 30% coated urea with releasing time in 30 d, 35% coated urea with releasing time in 90 d and 35% coated urea with releasing time in 120 d mixed application (F₃) had the highest soil residual N. And soil apparent N loss of F3 were the lowest in all treatments.

Key words: Controlled-release coated urea, Winter wheat, Yields, Apparent N recovery rates

CLC Number:

S512.1

WANG Li-ying, ZHANG Yan-cai, WANG Kai-hui, LI Ruo-nan, LI Qiao-yun, CHENG Li-li, ZHAI Cai-xia. The Effect of Controlled-release Coated Urea on Wheat Yield and Apparent N Recovery Rates[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2008, 23(S1): 197-200. doi: 10.7668/hbnxb.2008.S1.047.

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