Chemical fertilizer rate, use efficiency and reduction of cereal crops in China, 1998–2018

A field experiment was conducted in Ninghe, Tianjin, China, using 15N isotope method to evaluate the application of organic fertilizer on N distribution patterns of labelled and unlabeled N fertilizer, ammonium sulfate -15N uptake by rice, N use efficiency (NUE), and the fate of (15NH4)2SO4 applied. The experiment included eight treatments: CK-N (control + no-duck), CK-D (control + ducks), CF-N (chemical fertilizer + no-ducks), CF-D (chemical fertilizer + ducks), CM-N (chemical fertilizer + organic fertilizer + no-ducks), CM-D (chemical fertilizer + organic fertilizer + ducks), CD-N (chemical fertilizer 30% off + organic fertilizer + no-ducks), and CD-D (chemical fertilizer 30% off + organic fertilizer + ducks). The results showed that the application of organic fertilizer whether CM or CD significantly increased N and P concentrations over control (CK) and chemical fertilizer (CF). Moreover, no-significant differences were found in 15N fresh grain and husk concentration. Both organs ranged of 14.2-14.4 g kg-1 and 6.2-6.3 g kg-1, respectively. N derived from the fertilizer and soil significantly affected fresh grain compared to fresh husk. However, N uptake and N use efficiency did not show any differences. We concluded that organic fertilizer has a significant influence on rice growth and promote crop productivity.

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The impact of land fragmentation on farmer's chemical fertilizer use efficiency

自然资源学报 ◽

10.31497/zrzyxb.20191216 ◽

2019 ◽

Vol 34 (12) ◽

pp. 2687

Author(s):

SHI Chang-liang ◽

ZHANG Yi ◽

GUO Yan ◽

ZHU Jun-feng

Keyword(s):

Chemical Fertilizer ◽

Fertilizer Use Efficiency ◽

Land Fragmentation ◽

Fertilizer Use ◽

Use Efficiency ◽

The Impact

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Effect of date of sowing and rainfall on sustainability of yield and rainwater use efficiency in cereal crops under arid alfisols

Journal of Agrometeorology ◽

10.54386/jam.v21i2.234 ◽

2021 ◽

Vol 21 (2) ◽

pp. 203-209

Author(s):

B.SAHADEVA REDDY ◽

B.RAVINDRANATHA REDDY ◽

C.RADHA KUMARI ◽

G.R.MARUTHI SANKAR ◽

Y.ASHOKA REDDY ◽

...

Keyword(s):

Pearl Millet ◽

Foxtail Millet ◽

Maximum Yield ◽

Seasonal Rainfall ◽

Cereal Crops ◽

Growing Period ◽

Use Efficiency ◽

Equivalent Yield ◽

Onset Of Monsoon ◽

Made In

An assessment of the effects of date of sowing and crop seasonal rainfall on the sustainability of yield and rainwater use efficiency (RWUE) of sorghum, pearl millet and foxtail millet sown on five dates at 15 days interval from first fortnight of June to first fortnight of August during 2009 to 2014 under arid Alfisols at Anantapur has been made in this paper. A suitable date of sowing has been identified for each crop based on the relationships sorghum equivalent yield with crop seasonal rainfall and crop growing period observed in the 6-year study. The yield was significantly influenced by the variation in the crop seasonal rainfall and crop growing period when sown on different dates of sowing. It was significantly higher when crops were sown with the onset of monsoon in the first fortnight of June, and decreased with the subsequent sowings. Among crops, sorghum attained maximum mean yield of 923 kg ha-1 with RWUE of 2.73 kg ha-1 mm-1; while pearl millet attained mean yield of 873 kg ha-1 with RWUE of 2.95 kg ha-1 mm-1 and foxtail millet attained mean yield of 646 kg ha-1 with RWUE of 1.64 kg ha-1 mm-1 when sown during first fortnight of June. Based on the ranks assigned to the yield attained on different dates of sowing in different years, pearl millet was superior for sustaining maximum yield and RWUE comparedto sorghum and foxtail millet under arid Alfisols at Anantapur.

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