Abstract
Protected cultivation is a resource-efficient method of crop production, however, at the same time, it is resource intensive. An optimum rate and time of fertilizer application is required in order to maximize crop yield vis-à-vis resource use efficiency. However, these aspects are scarcely studied for tomato under low- and medium-tech greenhouses in Indian humid sub-tropics. In this regard, a two-year study was conducted to assess the effect of four NPK fertilization rates (i.e., 120, 100, 80, and 60% of the recommended dose of fertilizers, RDF) and three fertigation scheduling approaches—fertigation at different stages in different proportions of NPK, along with an additional treatment, i.e., farmers’ practice (soil-based application of recommended NPK) for tomatoes under a naturally ventilated polyhouse. The plant growth attributes, the tomato yield- and quality-related traits, the nutrient (NPK) accumulation by the plants, the water use efficiency (WUE), and economics were studied in response to different fertigation rates and scheduling approaches. These parameters were affected by both the rates of NPK fertilization and their time of application (scheduling) over the different growth stages. Among the different rates and time of fertigation, the recommended dose of fertilizer (100% RDF) (i.e., 300 kg N, 150 kg P2O5, and 150 kg K2O per ha and their scheduling as 15% N, 10% P2O5, and 10% K2O of RDF during 15–45 days after transplanting (P1); 40% N, 40% P2O5, and 40% K2O of RDF during 47–76 DAT (P2); 30% N, 40% P2O5, and 40% K2O of RDF during 77–107 DAT (P3); and 15% N, 10% P2O5, and 10% K2O of RDF during 108–138 DAT (P4)) was found to be the optimum for fruit yield, WUE, and economics of tomato under protected condition.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 2
Claim · model-written summary
The recommended dose of fertilizer (100% RDF) with its four-stage scheduling was the optimum for tomato fruit yield, WUE and economics under protected condition.
- Taxon
- Tomato
Solanum lycopersicumt0 - Treatment
- the recommended dose of fertilizer (100% RDF)e2
- Outcome
- fruit yield, WUE, and economicse3
- Direction
- optimume3
- Comparator
- the different rates and time of fertigatione2
- Setting
- naturally ventilated polyhousee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato Performance under Naturally Ventilated Polyhouse”
e0“for tomatoes under a naturally ventilated polyhouse”
e2“Among the different rates and time of fertigation, the recommended dose of fertilizer (100% RDF) (i.e., 300 kg N, 150 kg P2O5, and 150 kg K2O per ha”
e3“was found to be the optimum for fruit yield, WUE, and economics of tomato under protected condition”
Claim · model-written summary
NPK fertilization rates and their time of application affected tomato growth, nutrient accumulation, yield and water use efficiency.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- rates of NPK fertilization and their time of application (scheduling)e1
- Outcome
- These parameterse1
- Direction
- affectede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato Performance under Naturally Ventilated Polyhouse”
e1“These parameters were affected by both the rates of NPK fertilization and their time of application (scheduling) over the different growth stages”
The same questions in other papers
fertilization · physiology: water · Solanum lycopersicum (tomato)Positive and negative results
32 papers in the same direction as this paper · 8 in the opposite direction
- positive
- negative
- no effect
37 papers more in this group
See all 41 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.