Abstract
A field experiment was conducted in maize under medium-term conservation agriculture (CA) based maizewheat system at BISA-CIMMYT, Ladhowal, Punjab during kharif 2019 to assess the effect of CA+ practices (CA with sub-surface drip irrigation) with variable N doses on maize. The CA+ treatments were residue retained (WR) permanent bed (PB) with sub-surface drip fertigation (PB-SSD): without N (N0), 120 kg N/ha,150 kg N/ha applied in 4-equal (Eq) and differential splits (Df); CA alone treatment includ PB furrow irrigation with 120 kg N/ha (PBWRFurrow- N120); conventional tillage (CT) involved furrow irrigation with 120 kg N/ha (CTWOR-Furrow-N120) and other treatments were residue removed (WOR) PB: PBWOR-without N (N0), with 120 kg N/ha, and 150 kg N/ha applied in four Eq-splits and Df-splits. The findings of the present experiment showed that the numerical value of yield attributing characters were higher under CA+ plots as compared to CA alone (PBWR-Furrow-N120) and CT (CTWOR-Furrow-N120). Biological yield of maize was significantly higher in all CA+ plots as compared to CA alone and CT plots. Highest biological yield was recorded under PBWR-SSD-N150 Df (23.45 t/ha). Highest no. of cobs (72800/ha), no. of grains/cob (605) and cob length (22.61cm) along with dry matter resulted highest biological yield in PBWR-SSD-N150 plots. The grain N content remained statistically similar across all the N management plots, but in case of total N uptake, PBWR-SSD-N150 Df (CA+) plots dominated due to higher biomass. Besides, CA+ based PBWR-SSD-N120 (average of Df and Eq) registered 23-24% higher total N uptake than CA alone (PBWRFurrow- N120) and conventional (CTWOR-Furrow-N120) plots. Improved agronomic N use-efficiency was also recorded under CA+ plots as compared to CA alone (36.4 kg/kg N) and CT (36.7 kg/kg N) plots.
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Claims 10
Claim · model-written summary
Yield attributing characters of maize were numerically higher under CA+ plots than under CA alone and conventional tillage.
- Treatment
- CA+ plotse2
- Outcome
- yield attributing characterse2
- Direction
- highere2
- Qualifier
- numerical valuee2
- Comparator
- CA alone (PBWR-Furrow-N120) and CT (CTWOR-Furrow-N120)e2
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“to assess the effect of CA+ practices (CA with sub-surface drip irrigation) with variable N doses on maize”
e2“the numerical value of yield attributing characters were higher under CA+ plots as compared to CA alone (PBWR-Furrow-N120) and CT (CTWOR-Furrow-N120)”
Claim · model-written summary
Biological yield of maize was significantly higher in all CA+ plots than under CA alone and conventional tillage.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“to assess the effect of CA+ practices (CA with sub-surface drip irrigation) with variable N doses on maize”
e3“Biological yield of maize was significantly higher in all CA+ plots as compared to CA alone and CT plots”
Claim · model-written summary
Biological yield of maize was highest under PBWR-SSD-N150 Df at 23.45 t/ha.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“to assess the effect of CA+ practices (CA with sub-surface drip irrigation) with variable N doses on maize”
e4“Highest biological yield was recorded under PBWR-SSD-N150 Df (23.45 t/ha)”
Claim · model-written summary
Number of maize cobs was highest in PBWR-SSD-N150 plots at 72800/ha.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“to assess the effect of CA+ practices (CA with sub-surface drip irrigation) with variable N doses on maize”
e5“Highest no. of cobs (72800/ha), no. of grains/cob (605) and cob length (22.61cm) along with dry matter resulted highest biological yield in PBWR-SSD-N150 plots”
Claim · model-written summary
Number of grains per cob of maize was highest in PBWR-SSD-N150 plots at 605.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“to assess the effect of CA+ practices (CA with sub-surface drip irrigation) with variable N doses on maize”
e5“Highest no. of cobs (72800/ha), no. of grains/cob (605) and cob length (22.61cm) along with dry matter resulted highest biological yield in PBWR-SSD-N150 plots”
Claim · model-written summary
Cob length of maize was highest in PBWR-SSD-N150 plots at 22.61cm.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“to assess the effect of CA+ practices (CA with sub-surface drip irrigation) with variable N doses on maize”
e5“Highest no. of cobs (72800/ha), no. of grains/cob (605) and cob length (22.61cm) along with dry matter resulted highest biological yield in PBWR-SSD-N150 plots”
Claim · model-written summary
Grain N content of maize was statistically similar across all N management plots.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“to assess the effect of CA+ practices (CA with sub-surface drip irrigation) with variable N doses on maize”
e6“The grain N content remained statistically similar across all the N management plots”
Claim · model-written summary
Total N uptake of maize was dominated by PBWR-SSD-N150 Df (CA+) plots due to higher biomass.
- Treatment
- PBWR-SSD-N150 Df (CA+) plotse7
- Outcome
- total N uptakee7
- Direction
- dominatede7
- Qualifier
- due to higher biomasse7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“to assess the effect of CA+ practices (CA with sub-surface drip irrigation) with variable N doses on maize”
e7“in case of total N uptake, PBWR-SSD-N150 Df (CA+) plots dominated due to higher biomass”
Claim · model-written summary
CA+ based PBWR-SSD-N120 registered 23-24% higher total N uptake than CA alone and conventional tillage in maize.
- Treatment
- CA+ based PBWR-SSD-N120e0
- Outcome
- total N uptakee0
- Direction
- highere0
- Value
- 23-24%e0
- Comparator
- CA alone (PBWRFurrow- N120) and conventional (CTWOR-Furrow-N120)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“to assess the effect of CA+ practices (CA with sub-surface drip irrigation) with variable N doses on maize”
e0“CA+ based PBWR-SSD-N120 (average of Df and Eq) registered 23-24% higher total N uptake than CA alone (PBWRFurrow- N120) and conventional (CTWOR-Furrow-N120) plots”
Claim · model-written summary
Agronomic N use-efficiency of maize improved under CA+ plots compared with CA alone and conventional tillage.
- Treatment
- CA+ plotse0
- Outcome
- agronomic N use-efficiencye0
- Direction
- Improvede0
- Comparator
- CA alone (36.4 kg/kg N) and CT (36.7 kg/kg N)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“to assess the effect of CA+ practices (CA with sub-surface drip irrigation) with variable N doses on maize”
e0“Improved agronomic N use-efficiency was also recorded under CA+ plots as compared to CA alone (36.4 kg/kg N) and CT (36.7 kg/kg N) plots”
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