Effect of N Fertilization Pattern on Rice Yield, N Use Efficiency and Fertilizer–N Fate in the Yangtze River Basin, China

Liu, Xiaowei; Wang, Huoyan; Zhang, Jianmin; Hu, Fengqin; Zhu, Dan; Chen, Zhaoming; Liu, Yongzhe

doi:10.1371/journal.pone.0166002

Cited by 101 publications

(73 citation statements)

References 31 publications

(47 reference statements)

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“…Therefore, rice should be kept weed free as much as possible through the life cycle to obtain good yield. Yield variations in rice due to weeding were also observed by many researchers (Chowdhury et al, 1994;Ahmed et al, 1998;Hossain et al, 2002;Islam et al, 2003, Liu et al, 2016.…”

Section: Effect Of Weed Managementsupporting

confidence: 52%

Effect of nitrogen fertilizer and weed management on the yield of transplant aman rice

Adhikari

Sarkar

Uddin

et al. 2018

J Bangladesh Agric Univ

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The research work was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during aman season from July to December, 2015 to study the effect of nitrogen fertilizer and weed management on the growth and yield of transplant aman rice cv. BRRI dhan46. The experiment consisted of four fertilizer treatments viz. 0 kg N ha −1 (N 0 ), 40 kg N ha −1 (N 1 ), 80 kg N ha −1 (N 2 ) and 120 kg N ha −1 (N 3 ) and four weeding treatments viz. one hand weeding at 20 DAT (W 1 ), two hand weedings at 20 and 35 DAT (W 2 ), three hand weedings at 20, 35 and 50 DAT (W 3 ), weeding by Japanese rice weeder twice at 20 and 35 DAT (W 4 ) and unweeded control (W 5 ). The experiment was laid out in randomized complete block design with three replications. The highest plant height (113.00 cm), number of total tillers hill −1 (8.74), number of effective tillers hill −1 (6.18), panicle length (21.98 cm), number of grains panicle −1 (114.20), grain yield (4.00 t ha −1 ), straw yield (5.25 t ha −1 ) and biological yield (9.25 t ha −1 ) were recorded in N 2 (80 kg N ha −1 ) treatment. The lowest plant height (106.00 cm), number of total tillers hill -1 (7.20), number of effective tillers hill −1 (5.00), panicle length (20.70 cm), number of grains panicle -1 (97.60), grain yield (3.52 t ha −1 ), straw yield (4.46 t ha −1 ) and biological yield (7.97 t ha −1 ) were recorded from N 0 (No nitrogen fertilizer control) treatment. On the other hand, the highest grain yield 4.23 t ha −1 was observed in three weedings condition because of the highest number of effective tillers hill −1 (6.81), number of grains panicle −1 (111.10). The highest straw yield (5.51 t ha −1 ) was also found in three weeding condition. The lowest grain yield (3.40 t ha −1 ) was recorded in W 5 (unweeded control) treatment. The lowest straw yield (4.31 t ha −1 ) was also observed in W 5 (unweeded control) treatment because of the smallest plant (106.97 cm) and lower number of total tillers hill −1 (7.20). Therefore, 80 kg N ha −1 along with three hand weedings at 20, 35 and 50 DAT may be used for obtaining the highest grain and straw yields of BRRI dhan46.

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Section: Effect Of Weed Managementsupporting

confidence: 52%

Effect of nitrogen fertilizer and weed management on the yield of transplant aman rice

Adhikari

Sarkar

Uddin

et al. 2018

J Bangladesh Agric Univ

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“…Liu et al (2016) also determined that NDP could maintain higher soil NH 4 + -N concentration in different soil layers at 30 and 60 days after transplanting compared to NBP. As shown in Figure 2 , the NH 4 + -N concentration remained at a low level and gradually increased during the first 7 days after transplanting.…”

Section: Discussionmentioning

confidence: 99%

Nitrogen Fertilizer Deep Placement for Increased Grain Yield and Nitrogen Recovery Efficiency in Rice Grown in Subtropical China

et al. 2017

Front. Plant Sci.

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Field plot experiments were conducted over 3 years (from April 2014 to November 2016) in a double-rice (Oryza sativa L.) cropping system in subtropical China to evaluate the effects of N fertilizer placement on grain yield and N recovery efficiency (NRE). Different N application methods included: no N application (CK); N broadcast application (NBP); N and NPK deep placement (NDP and NPKDP, respectively). Results showed that grain yield and apparent NRE significantly increased for NDP and NPKDP as compared to NBP. The main reason was that N deep placement (NDP) increased the number of productive panicle per m-2. To further evaluate the increase, a pot experiment was conducted to understand the N supply in different soil layers in NDP during the whole rice growing stage and a 15N tracing technique was used in a field experiment to investigate the fate of urea-15N in the rice–soil system during rice growth and at maturity. The pot experiment indicated that NDP could maintain a higher N supply in deep soil layers than N broadcast for 52 days during rice growth. The 15N tracing study showed that NDP could maintain much higher fertilizer N in the 5–20 cm soil layer during rice growth and could induce plant to absorb more N from fertilizer and soil than NBP, which led to higher NRE. One important finding was that NDP and NPKDP significantly increased fertilizer NRE but did not lead to N declined in soil compared to NBP. Compared to NPK, NPKDP induced rice plants to absorb more fertilizer N rather than soil N.

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“…However, the use of large amounts of inorganic fertilizers, including N fertilizers [52], alone causes high losses and a low recovery of N, especially in sandy loam soil such as that of the study site. These high N losses lead not only to a low NUE but also to environmental pollution and high costs to farmers.…”

Section: Beneficial Effects Of Combined Inorganic and Organic Fertilimentioning

confidence: 99%

Effects of Combined Application of Inorganic Fertilizer and Organic Manures on Nitrogen Use and Recovery Efficiencies of Hybrid Rice (Palethwe-1)

Moe¹,

Mg²,

Win³

et al. 2017

AJPS

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We conducted two field experiments to investigate combined effects of organic and inorganic fertilizers on nitrogen use and recovery efficiencies of hybrid rice (Palethwe-1) during dry and wet seasons, 2015. Four levels of inorganic fertilizer (0%, 50%, 75%, and 100% NPK), based on recommended rates of 150 kg N ha , were used with cow manure, poultry manure, and vermicompost (5 t·ha −1 each) in a split-plot design with three replicates. In both seasons, with 50% NPK, the N uptake level achieved with poultry manure was similar to that obtained with 75% and 100% NPK. The greatest N use, internal, agronomic N use, and recovery efficiencies were obtained with 50% NPK + poultry manure, but were similar to those obtained from cow manure and vermicompost subplots. As the amount of applied N from organic and inorganic fertilizer increased, the N use efficiency and related parameters decreased, due to similar yields among plots with different NPK application levels. Poultry manure resulted in the highest significant correlations between applied N and N accumulation, followed by cow manure and vermicompost, in both seasons. Neither chemical fertilizer nor organic manure alone led to optimum N use and N recovery efficiencies. The combination of 50% inorganic fertilizer (75 kg N ha 1044ganic fertilizers and organic manures had the benefits not only in reducing the need for chemical fertilizers but also in improving N uptake by hybrid rice (Palethwe-1) leading to the better environment.

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Effect of N Fertilization Pattern on Rice Yield, N Use Efficiency and Fertilizer–N Fate in the Yangtze River Basin, China

Cited by 101 publications

References 31 publications

Effect of nitrogen fertilizer and weed management on the yield of transplant aman rice

Effect of nitrogen fertilizer and weed management on the yield of transplant aman rice

Nitrogen Fertilizer Deep Placement for Increased Grain Yield and Nitrogen Recovery Efficiency in Rice Grown in Subtropical China

Effects of Combined Application of Inorganic Fertilizer and Organic Manures on Nitrogen Use and Recovery Efficiencies of Hybrid Rice (Palethwe-1)

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