Abstract
A field experiment was conducted to evaluate yield performance and soil fertility of onion ( Allium cepa ) grown with beef cattle manure compost (CMC) under a reduced rate of chemical fertilizer for sustainable production in the 2006–07 growing season. Chemical fertilizer application rate was reduced to a third of the recommended rate of nitrogen (N), phosphorus (P), and potassium (K). Treatments consisted of five levels of CMC (0, 20, 40, 60, and 80 Mg·ha −1 ). There was a significant increasing effect on growth and yield parameters by applying CMC compared with 0 Mg·ha −1 . In addition, there was also a significant increasing quadratic effect on yield on increasing CMC rates from 0 to 80 Mg·ha −1 with an R 2 of 0.46. Maximum marketable yield was 62.7 Mg·ha −1 at 40 Mg·ha −1 CMC, which was due to increased stand reduction and unmarketable bulbs as well as decreased bulb weight at higher rates of CMC. The CMC rates had no effect on bulb dry weight and N or P concentration in the bulb and leaf. Furthermore, there was an increasing linear effect on soil pH, and organic matter (OM), available P, and exchangeable cations throughout vegetative growth and at harvest. We concluded that the excessive application of CMC did not affect onion yield and accumulated soil fertility.
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Claims 8
Claim · model-written summary
CMC significantly increased growth and yield parameters relative to zero CMC.
- Taxon
- onion
Allium cepat0 - Treatment
- CMCe0
- Outcome
- growth and yield parameterse0
- Direction
- increasinge0
- Comparator
- 0 Mg·ha −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was a significant increasing effect on growth and yield parameters by applying CMC compared with 0 Mg·ha −1 .”
t0“onion”
Claim · model-written summary
Yield showed a significant quadratic increase across CMC rates, with R² 0.46.
- Taxon
- onionAllium cepat0
- Treatment
- CMC rates from 0 to 80 Mg·ha −1e0
- Outcome
- yielde0
- Direction
- increasinge0
- Value
- 0.46e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was also a significant increasing quadratic effect on yield on increasing CMC rates from 0 to 80 Mg·ha −1 with an R 2 of 0.46”
t0“onion”
Claim · model-written summary
Maximum marketable yield was 62.7 Mg·ha−1 at 40 Mg·ha−1 CMC.
- Taxon
- onionAllium cepat0
- Treatment
- 40 Mg·ha −1 CMCe0
- Outcome
- marketable yielde0
- Direction
- Maximume0
- Value
- 62.7 Mg·ha −1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maximum marketable yield was 62.7 Mg·ha −1 at 40 Mg·ha −1 CMC”
t0“onion”
Claim · model-written summary
Higher CMC rates increased stand reduction and unmarketable bulbs.
- Taxon
- onionAllium cepat0
- Treatment
- higher rates of CMCe0
- Outcome
- stand reduction and unmarketable bulbse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased stand reduction and unmarketable bulbs as well as decreased bulb weight at higher rates of CMC”
t0“onion”
Claim · model-written summary
Higher CMC rates decreased bulb weight.
- Taxon
- onionAllium cepat0
- Treatment
- higher rates of CMCe0
- Outcome
- bulb weighte0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased stand reduction and unmarketable bulbs as well as decreased bulb weight at higher rates of CMC”
t0“onion”
Claim · model-written summary
CMC rates did not affect bulb dry weight or bulb and leaf N and P concentrations.
- Taxon
- onionAllium cepat0
- Treatment
- CMC ratese0
- Outcome
- bulb dry weight and N or P concentration in the bulb and leafe0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The CMC rates had no effect on bulb dry weight and N or P concentration in the bulb and leaf.”
t0“onion”
Claim · model-written summary
CMC rates linearly increased soil pH and organic matter.
- Taxon
- onionAllium cepat0
- Treatment
- CMCe1
- Outcome
- soil pH, and organic matter (OM)e0
- Direction
- increasinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was an increasing linear effect on soil pH, and organic matter (OM), available P, and exchangeable cations throughout vegetative growth and at harvest”
t0“onion”
e1“There was a significant increasing effect on growth and yield parameters by applying CMC compared with 0 Mg·ha −1 .”
Claim · model-written summary
CMC rates linearly increased available P and exchangeable cations.
- Taxon
- onionAllium cepat0
- Treatment
- CMCe1
- Outcome
- available P, and exchangeable cationse0
- Direction
- increasinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was an increasing linear effect on soil pH, and organic matter (OM), available P, and exchangeable cations throughout vegetative growth and at harvest”
t0“onion”
e1“There was a significant increasing effect on growth and yield parameters by applying CMC compared with 0 Mg·ha −1 .”
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See all 530 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.