Abstract
Physico-chemical features of chitosan affect its biological activity on plants. In this work, the influence of chitosan molecular mass in potato (Solanum tuberosum L.) yields was investigated. By using chitosan polymers of high (CH-1) and low (CH-2) molecular weight and a hydrolysed chitosan derivative (CHH), two experiments were performed under field conditions to determine the effect of these polymers on yields of two potato varieties, ‘Call White’ and ‘Santana’. For this purpose, the foliar spray of low doses of the derivatives at three cultivation moments was performed and several yield variables were determined at crop harvest. All three chitosan compounds increased the performance variables determined respect to the control, depending on the variable, the dose employed and the mass of the derivative evaluated. In most variables determined, the two lowest doses (200 and 325 mg/ha) provoked the highest increments above control. Chitosans also affected distribution of mass per tuber size, particularly; in ‘Santana’ variety the two lowest doses enhanced the commercial tuber sizes. Among the polymers, CH-1 caused the greatest increases in performance, while, compared to the polymer, CHH provoked higher yields. In conclusion, foliar application at low doses of high molecular weight and hydrolysed chitosan enhanced potato yield between 15-30%.
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Claims 6
Claim · model-written summary
All three chitosans increased potato performance variables relative to control.
- Taxon
- potato
Solanum tuberosumt0 - Treatment
- chitosan compoundse0
- Outcome
- performance variablese0
- Direction
- increasede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All three chitosan compounds increased the performance variables determined respect to the control, depending on the variable, the dose employed and the mass of the derivative evaluated.”
t0“potato (Solanum tuberosum L.)”
Claim · model-written summary
The two lowest doses gave the highest increments in most yield variables.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- 200 and 325 mg/hae0
- Outcome
- variablese0
- Direction
- highest incrementse0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In most variables determined, the two lowest doses (200 and 325 mg/ha) provoked the highest increments above control.”
t0“potato (Solanum tuberosum L.)”
Claim · model-written summary
The two lowest doses enhanced commercial tuber sizes in Santana.
- Taxon
- potatoSolanum tuberosumt0
- Material
- ‘Santana’e0
- Treatment
- the two lowest dosese0
- Outcome
- commercial tuber sizese0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in ‘Santana’ variety the two lowest doses enhanced the commercial tuber sizes.”
t0“potato (Solanum tuberosum L.)”
Claim · model-written summary
CH-1 caused the greatest performance increases among the polymers.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- CH-1e0
- Outcome
- performancee0
- Direction
- greatest increasese0
- Comparator
- the polymerse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Among the polymers, CH-1 caused the greatest increases in performance”
t0“potato (Solanum tuberosum L.)”
Claim · model-written summary
Hydrolysed CHH gave higher yields than the polymer.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“compared to the polymer, CHH provoked higher yields.”
t0“potato (Solanum tuberosum L.)”
Claim · model-written summary
Low doses of high molecular weight and hydrolysed chitosan enhanced potato yield by 15-30%.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- foliar application at low doses of high molecular weight and hydrolysed chitosane0
- Outcome
- potato yielde0
- Direction
- enhancede0
- Value
- 15-30%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“foliar application at low doses of high molecular weight and hydrolysed chitosan enhanced potato yield between 15-30%.”
The same questions in other papers
chitosan · yield · Solanum tuberosum (potato)Results agree
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- positive
- positive
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See all 5 papers →application · yield · Solanum tuberosum (potato)Positive and negative results
176 papers in the same direction as this paper · 14 in the opposite direction
- no effect
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- negative
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See all 191 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.