Abstract
The present investigation aimed at evaluating the effect of Calliandra calothyrsus Meisn green manure on the quality improvement of maize (Zea mays L.) stover compost. To that end, two field experiments were installed with maize (Zea mays L.) and a successive potato (Solanum tuberosum L.) crop, which was specifically set up to investigate the potential residual effects of tested organo-mineral fertilizers. The potato (Solanum tuberosum L.) crop did not receive any fertilizer, either organic or mineral. The experimental design was a randomized complete block with three replicates. The basic experimental plot was 1.6 m wide and 3 m long (4.8 m). Treatments under evaluation were: T1=Control, T2=Maize stover co-composted with mineral fertilizer, T3=Maize stover co-compost with Calliandra calothyrsus Meisn green manure; T4=Farm manure+45-60-30; and T5=Maize stover co-composted with Calliandra calothyrsus Meisn green manure+45-60-30. Evaluated parameters were grain yields, root biomass, above-ground biomass, Harvest Index, and Root/Shoot ratio for maize (Zea mays L.). Potato yields were categorized into small size (< 35 mm), medium size (35-65 mm) and big size tubers (> 65 mm). Significant effects (p < 0.001) of tested fertilizer treatments were observed for maize grain yields (GY), above-ground biomass (AGB), and root biomass (RB). No effect (p > 0.05) of fertilizer treatments could be noticed on the harvest index or R/S ratio (0.079-0.088). For the successive potato crop, a significant effect (p < 0.001) of tested treatments was only observed for the seed-oriented medium size tubers (MST) potato yield. Overall, the most relevant observation of the maize experiment is that treatments T4 and T5 gave higher and equivalent grain and biomass yields. From there, we derive that maize stover co-composted with Calliandra calothyrsus Meisn green manure could be a sound substitute to farm manure. Additionally, the potato experiment highlighted the residual effects of the T3 treatment, statistically equivalent to that of T2. Consequently, we advise that the effects of compost-based organo-mineral fertilizers on crop yields should be evaluated beyond a single seasonal crop, in order to fully catch their residual fertilizer potentials.
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Claims 7
Claim · model-written summary
Fertilizer treatments had significant effects (p < 0.001) on maize grain yield, above-ground biomass and root biomass
- Treatment
- tested fertilizer treatmentse0
- Outcome
- maize grain yields (GY), above-ground biomass (AGB), and root biomass (RB)e0
- Qualifier
- p < 0.001e0
Zea maysNot reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant effects (p < 0.001) of tested fertilizer treatments were observed for maize grain yields (GY), above-ground biomass (AGB), and root biomass (RB)”
Claim · model-written summary
Fertilizer treatments had no effect on maize harvest index or root-to-shoot ratio (0.079-0.088)
- Treatment
- fertilizer treatmentse1
- Outcome
- harvest index or R/S ratioe1
- Direction
- No effecte1
- Value
- 0.079-0.088e1
- Qualifier
- p > 0.05e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant effects (p < 0.001) of tested fertilizer treatments were observed for maize grain yields (GY), above-ground biomass (AGB), and root biomass (RB)”
e1“No effect (p > 0.05) of fertilizer treatments could be noticed on the harvest index or R/S ratio (0.079-0.088)”
Claim · model-written summary
Treatments T4 and T5 gave higher and equivalent grain and biomass yields of maize
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Overall, the most relevant observation of the maize experiment is that treatments T4 and T5 gave higher and equivalent grain and biomass yields”
Claim · model-written summary
Fertilizer treatments had a significant residual effect (p < 0.001) on the medium size tuber yield of the successive potato crop
- Taxon
- potato
Solanum tuberosume3 - Treatment
- tested treatmentse3
- Outcome
- seed-oriented medium size tubers (MST) potato yielde3
- Qualifier
- p < 0.001e3
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“a significant effect (p < 0.001) of tested treatments was only observed for the seed-oriented medium size tubers (MST) potato yield”
Claim · model-written summary
Residual effects of the T3 treatment on potato were statistically equivalent to those of T2
- Taxon
- potatoSolanum tuberosume4
- Treatment
- T3 treatmente4
- Outcome
- residual effectse4
- Direction
- statistically equivalente4
- Comparator
- T2e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“the potato experiment highlighted the residual effects of the T3 treatment, statistically equivalent to that of T2”
Claim · model-written summary
Maize stover co-composted with Calliandra calothyrsus Meisn green manure could be a sound substitute to farm manure
- Treatment
- maize stover co-composted with Calliandra calothyrsus Meisn green manuree5
- Outcome
- substitute to farm manuree5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“From there, we derive that maize stover co-composted with Calliandra calothyrsus Meisn green manure could be a sound substitute to farm manure”
Claim · model-written summary
The effects of compost-based organo-mineral fertilizers on crop yields should be evaluated beyond a single seasonal crop
Verbatim
e6“Consequently, we advise that the effects of compost-based organo-mineral fertilizers on crop yields should be evaluated beyond a single seasonal crop”
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fertilization · yield · Zea mays (maize)Positive and negative results
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