TY - JOUR
T1 - Coated controlled-release urea improves soil NO3−−N accumulation, rubber yield and economic profit in a Hevea brasiliensis plantation
AU - Yang, Chunxia
AU - Xu, Muguo
AU - Ding, Huaping
AU - He, Xinhua
N1 - Publisher Copyright:
© 2024 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.
PY - 2024/8/23
Y1 - 2024/8/23
N2 - Mitigating nitrogen (N) loss via slow-released N is critical for sustainable rubber (Hevea brasiliensis) plantations. This study aimed to elucidate effects of coated controlled-release urea (CCRU) and conventional urea ratios on variations in soil and leaf N and rubber production. Treatments with the same total N input included 0% (N0, 100% conventional urea), 40% (N0.4), 60% (N0.6) and 80% (N0.8) of CCRU and corresponding conventional urea. Averaged results for the two whole 6-month periods (April to September) in 2019 and 2020 showed significantly higher monthly soil NO3−-N concentrations between all four CCRU fertilizations as N0.6 = N0.8 > N0.4 > N0 at both 0−20 cm and 20−40 cm depths, rubber concentrations as N0.6 = N0.8 = N0.4 > N0, rubber yield, partial factor productivity of N fertilizer and economic profit for rubber production as N0.8 ≈ N0.6 > N0.4 = N0, while leaf N or rubber yield significantly positively correlated with soil NH4+-N, NO3−-N or inorganic N. The 60% CCRU + 40% conventional urea (N0.6) suited mostly for the Yunnan mountainous rubber plantation. Our results can provide a better N fertilization strategy to increase N use efficiency and corresponding economic profit while mitigating N pollution risk for a sustainable rubber plantation.
AB - Mitigating nitrogen (N) loss via slow-released N is critical for sustainable rubber (Hevea brasiliensis) plantations. This study aimed to elucidate effects of coated controlled-release urea (CCRU) and conventional urea ratios on variations in soil and leaf N and rubber production. Treatments with the same total N input included 0% (N0, 100% conventional urea), 40% (N0.4), 60% (N0.6) and 80% (N0.8) of CCRU and corresponding conventional urea. Averaged results for the two whole 6-month periods (April to September) in 2019 and 2020 showed significantly higher monthly soil NO3−-N concentrations between all four CCRU fertilizations as N0.6 = N0.8 > N0.4 > N0 at both 0−20 cm and 20−40 cm depths, rubber concentrations as N0.6 = N0.8 = N0.4 > N0, rubber yield, partial factor productivity of N fertilizer and economic profit for rubber production as N0.8 ≈ N0.6 > N0.4 = N0, while leaf N or rubber yield significantly positively correlated with soil NH4+-N, NO3−-N or inorganic N. The 60% CCRU + 40% conventional urea (N0.6) suited mostly for the Yunnan mountainous rubber plantation. Our results can provide a better N fertilization strategy to increase N use efficiency and corresponding economic profit while mitigating N pollution risk for a sustainable rubber plantation.
KW - leaf nitrogen concentration
KW - NH-N
KW - NO-N
KW - rubber yield
KW - soil inorganic N concentration
UR - http://www.scopus.com/inward/record.url?scp=85202063867&partnerID=8YFLogxK
U2 - 10.1080/03650340.2024.2391287
DO - 10.1080/03650340.2024.2391287
M3 - Article
AN - SCOPUS:85202063867
SN - 0365-0340
VL - 70
SP - 1
EP - 19
JO - Archives of Agronomy and Soil Science
JF - Archives of Agronomy and Soil Science
IS - 1
ER -
