Abstract
Organic agriculture is becoming increasingly important, and many natural products are now available for organic farmers to manage and improve their crops. Several ethnobotanical studies have indicated that the use of nettle slurry as fertilizer in organic farming for horticultural crops is spreading. Sometimes, however, the consequences of using these natural products have been poorly evaluated, and there is very little scientific evidence for the effects of using these slurries. In this study, we aimed to analyze the possible effect of nettle slurry on potato yields produced by organic farming. To achieve this main objective, we assessed the effect of nettle slurry on potato yields, plant size and growth parameters, chlorophyll content, and the presence of pests and diseases. Different slurry doses were assessed in 36 plots and nine variables were measured during the crop cycle. Under these field experimental conditions, nettle slurry (including one treatment with Urtica in combination with Equisetum ) had no significant effects on yield, chlorophyll content, or the presence of pests and diseases in organic potato crops. The highest chlorophyll content was found in the double dose treatment, but the difference was not significant. This result, together with a small improvement in plant height with the double dose treatment, might indicate very slight crop enhancement which, under our experimental conditions, was not enough to improve yield. The Urtica and Equisetum slurry chemical analyses showed very low levels of nitrogen, phosphorus, and potassium.
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Claims 6
Claim · model-written summary
Nettle slurry had no significant effect on potato yield.
- Taxon
- potato
Solanum tuberosume0 - Treatment
- nettle slurrye0
- Outcome
- yielde0
- Direction
- no significant effectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under these field experimental conditions, nettle slurry (including one treatment with Urtica in combination with Equisetum ) had no significant effects on yield, chlorophyll content, or the presence of pests and diseases in organic potato crops.”
Claim · model-written summary
Nettle slurry had no significant effect on potato chlorophyll content.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- nettle slurrye0
- Outcome
- chlorophyll contente0
- Direction
- no significant effectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under these field experimental conditions, nettle slurry (including one treatment with Urtica in combination with Equisetum ) had no significant effects on yield, chlorophyll content, or the presence of pests and diseases in organic potato crops.”
Claim · model-written summary
Nettle slurry had no significant effect on pest and disease presence.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- nettle slurrye0
- Outcome
- presence of pests and diseasese0
- Direction
- no significant effectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under these field experimental conditions, nettle slurry (including one treatment with Urtica in combination with Equisetum ) had no significant effects on yield, chlorophyll content, or the presence of pests and diseases in organic potato crops.”
Claim · model-written summary
Double dose produced the highest chlorophyll content, without a significant difference.
- Taxon
- potato ( Solanum tuberosum L.)Solanum tuberosumt0
- Treatment
- double dose treatmente0
- Outcome
- chlorophyll contente0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest chlorophyll content was found in the double dose treatment, but the difference was not significant.”
t0“potato ( Solanum tuberosum L.)”
Claim · model-written summary
Double dose produced a small improvement in plant height.
- Taxon
- potato ( Solanum tuberosum L.)Solanum tuberosumt0
- Treatment
- double dose treatmente0
- Outcome
- plant heighte0
- Direction
- improvemente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a small improvement in plant height with the double dose treatment”
t0“potato ( Solanum tuberosum L.)”
Claim · model-written summary
Chemical analyses found very low nitrogen, phosphorus and potassium in the slurries.
- Taxon
- potato ( Solanum tuberosum L.)Solanum tuberosumt0
- Outcome
- very low levels of nitrogen, phosphorus, and potassiume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Urtica and Equisetum slurry chemical analyses showed very low levels of nitrogen, phosphorus, and potassium.”
t0“potato ( Solanum tuberosum L.)”
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