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Agronomic practices affect rice yield and nitrogen, phosphorus, and potassium accumulation, allocation and translocation
Author(s) -
Lv Yandong,
Hu Yue,
Jiang Hongfang,
Lan Yuchen,
Wang Heying,
Xu Lingqi,
Yin Dawei,
Zheng Guiping,
Guo Xiaohong
Publication year - 2020
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.1002/agj2.20060
Subject(s) - panicle , agronomy , phosphorus , oryza sativa , yield (engineering) , potassium , nitrogen , productivity , field experiment , cultivar , japonica rice , grain yield , fertilizer , biology , chemistry , biochemistry , materials science , organic chemistry , metallurgy , gene , macroeconomics , economics
Applying appropriate agronomic practices instead of conventional farming practices might improve rice yield. However, few studies have focused on how integrated agronomic practices affect N, P, and K accumulation and allocation in rice ( Oryza sativa L.). Therefore, this study was conducted to investigate grain yield, N, P, and K accumulation, and allocation under different agronomic practices. A japonica rice cultivar was grown in the field, with four agronomic practice treatments: no N application (N0), local farmers’ practice (FP), high‐yield practice (HYP), and super‐high‐yield (SHY) practice. The results showed that the latter two practices significantly increased grain yield by 11.0% and 26.4%, respectively, compared with that under FP, mainly as a result of an increase in mean number of panicles m −2 and spikelets panicle −1 . Mean aboveground N, P, and K accumulation significantly increased by 24.9, 15.3, and 79.1%, in HYP and 42.0, 38.8, and 219.7% in SHY, respectively, compared with that under FP. In particular, K accumulation was higher than N and P accumulation in HYP and SHY plants than those in FP plants. However, N, P, and K grain productivity was lower by 7.5, 9.5, and 20.3% under HYP, and 20.3, 17.2 and 62.7% under SHY treatments than that of FP, respectively, and N, P, and K grain productivity were negatively correlated with yield. Our results suggest that an increase in N, P, and K accumulation from the full‐heading stage (FH) to the maturity stage (MS) may assist with improving rice yields under HYP and SHY treatments.