Abstract
Intelligent drip fertigation (IF) is an efficient way to tailor water and nutrient requirement for crops to reduce their adverse impacts on environment. A three-year (2019–2021) field trials of watermelon was conducted to evaluate the effects of IF on yields and irrigation water and nutrient use efficiency of watermelon in a plastic greenhouse. The soil moisture was monitored with sensors (FDR) in the field in real time and interconnected with the computing devices embedded in the internet of things (IOT) to automatically control the irrigation and fertilization. The lower-upper limit of irrigation and the wetting soil depth were controlled accordingly to the crop stage. The fertilization rates were allocated based on the nutrient uptake characteristics of watermelon at different growth stages. The results showed the dry matter accumulation and N, P2O5, K2O uptakes of watermelon were fitted well with the "S" logistic growth function. The average proportions of dry matter accumulation, and N, P2O5, and K2O uptakes during the fruit expanding stage to the whole growth stage were 79.0%, 67.9%, 72.4%, and 71.8%, respectively. IF significantly reduced the application rates of irrigation water, N, P2O5, and K2O by 33%, 46%, 72% and 57%, respectively, without compromising watermelon yield and fruit quality. The irrigation water use efficiency, partial factor productivity, and agronomic efficiency in three years were increased significantly. The mechanism of IF treatment could be explained by tailoring the water and nutrient needs of crop by increasing root characteristics of watermelon to the water and nutrient uptake and translocation capacity of the root system. Intelligent drip fertigation is an efficient way to realize water and fertilizer space-time coupling and improve water and nutrient use efficiency.
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Claims 12
Claim · model-written summary
Intelligent drip fertigation reduced irrigation water application rate by 33% in watermelon.
- Taxon
- watermelon
Citrullus lanatuse1 - Treatment
- IFe1
- Outcome
- application rates of irrigation watere1
- Direction
- reducede1
- Value
- 33%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“IF significantly reduced the application rates of irrigation water, N, P2O5, and K2O by 33%, 46%, 72% and 57%, respectively, without compromising watermelon yield and fruit quality”
Claim · model-written summary
Intelligent drip fertigation reduced N application rate by 46% in watermelon.
- Taxon
- watermelonCitrullus lanatuse1
- Treatment
- IFe1
- Compound
- Ne1
- Outcome
- application ratese1
- Direction
- reducede1
- Value
- 46%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“IF significantly reduced the application rates of irrigation water, N, P2O5, and K2O by 33%, 46%, 72% and 57%, respectively, without compromising watermelon yield and fruit quality”
Claim · model-written summary
Intelligent drip fertigation reduced P2O5 application rate by 72% in watermelon.
- Taxon
- watermelonCitrullus lanatuse1
- Treatment
- IFe1
- Compound
- P2O5e1
- Outcome
- application ratese1
- Direction
- reducede1
- Value
- 72%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“IF significantly reduced the application rates of irrigation water, N, P2O5, and K2O by 33%, 46%, 72% and 57%, respectively, without compromising watermelon yield and fruit quality”
Claim · model-written summary
Intelligent drip fertigation reduced K2O application rate by 57% in watermelon.
- Taxon
- watermelonCitrullus lanatuse1
- Treatment
- IFe1
- Compound
- K2Oe1
- Outcome
- application ratese1
- Direction
- reducede1
- Value
- 57%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“IF significantly reduced the application rates of irrigation water, N, P2O5, and K2O by 33%, 46%, 72% and 57%, respectively, without compromising watermelon yield and fruit quality”
Claim · model-written summary
Intelligent drip fertigation did not compromise watermelon yield and fruit quality.
- Taxon
- watermelonCitrullus lanatuse1
- Treatment
- IFe1
- Outcome
- yield and fruit qualitye1
- Direction
- no_changeinferrede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“IF significantly reduced the application rates of irrigation water, N, P2O5, and K2O by 33%, 46%, 72% and 57%, respectively, without compromising watermelon yield and fruit quality”
Claim · model-written summary
Irrigation water use efficiency, partial factor productivity and agronomic efficiency increased significantly over three years with intelligent drip fertigation.
- Taxon
- watermelonCitrullus lanatuse1
- Treatment
- IFe1
- Outcome
- irrigation water use efficiency, partial factor productivity, and agronomic efficiencye2
- Direction
- increasede2
- Qualifier
- in three yearse2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“IF significantly reduced the application rates of irrigation water, N, P2O5, and K2O by 33%, 46%, 72% and 57%, respectively, without compromising watermelon yield and fruit quality”
e2“The irrigation water use efficiency, partial factor productivity, and agronomic efficiency in three years were increased significantly”
Claim · model-written summary
Dry matter accumulation and N, P2O5 and K2O uptake of watermelon were fitted well by a logistic growth function.
- Taxon
- watermelonCitrullus lanatuse3
- Outcome
- dry matter accumulation and N, P2O5, K2O uptakese3
- Qualifier
- fitted well with the "S" logistic growth functione3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“the dry matter accumulation and N, P2O5, K2O uptakes of watermelon were fitted well with the "S" logistic growth function”
Claim · model-written summary
Dry matter accumulation during the fruit expanding stage to whole growth stage was 79.0% of the total in greenhouse watermelon.
- Taxon
- watermelonCitrullus lanatust0
- Organ / stage
- fruit expanding stage to the whole growth stagee4
- Outcome
- average proportions of dry matter accumulatione4
- Value
- 79.0%e4
- Setting
- greenhouset0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“efficiency of watermelon in greenhouse”
e4“The average proportions of dry matter accumulation, and N, P2O5, and K2O uptakes during the fruit expanding stage to the whole growth stage were 79.0%, 67.9%, 72.4%, and 71.8%, respectively”
Claim · model-written summary
N uptake during the fruit expanding stage to whole growth stage was 67.9% of the total in greenhouse watermelon.
- Taxon
- watermelonCitrullus lanatust0
- Organ / stage
- fruit expanding stage to the whole growth stagee4
- Compound
- Ne4
- Outcome
- average proportions of dry matter accumulation, and N, P2O5, and K2O uptakese4
- Value
- 67.9%e4
- Setting
- greenhouset0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“efficiency of watermelon in greenhouse”
e4“The average proportions of dry matter accumulation, and N, P2O5, and K2O uptakes during the fruit expanding stage to the whole growth stage were 79.0%, 67.9%, 72.4%, and 71.8%, respectively”
Claim · model-written summary
P2O5 uptake during the fruit expanding stage to whole growth stage was 72.4% of the total in greenhouse watermelon.
- Taxon
- watermelonCitrullus lanatust0
- Organ / stage
- fruit expanding stage to the whole growth stagee4
- Compound
- P2O5e4
- Outcome
- average proportions of dry matter accumulation, and N, P2O5, and K2O uptakese4
- Value
- 72.4%e4
- Setting
- greenhouset0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“efficiency of watermelon in greenhouse”
e4“The average proportions of dry matter accumulation, and N, P2O5, and K2O uptakes during the fruit expanding stage to the whole growth stage were 79.0%, 67.9%, 72.4%, and 71.8%, respectively”
Claim · model-written summary
K2O uptake during the fruit expanding stage to whole growth stage was 71.8% of the total in greenhouse watermelon.
- Taxon
- watermelonCitrullus lanatust0
- Organ / stage
- fruit expanding stage to the whole growth stagee4
- Compound
- K2Oe4
- Outcome
- average proportions of dry matter accumulation, and N, P2O5, and K2O uptakese4
- Value
- 71.8%e4
- Setting
- greenhouset0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“efficiency of watermelon in greenhouse”
e4“The average proportions of dry matter accumulation, and N, P2O5, and K2O uptakes during the fruit expanding stage to the whole growth stage were 79.0%, 67.9%, 72.4%, and 71.8%, respectively”
Claim · model-written summary
Intelligent drip fertigation may improve watermelon root uptake and translocation capacity for water and nutrients.
- Taxon
- watermelonCitrullus lanatuse5
- Organ / stage
- roote5
- Treatment
- IFe5
- Outcome
- water and nutrient uptake and translocation capacity of the root systeme5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“The mechanism of IF treatment could be explained by tailoring the water and nutrient needs of crop by increasing root characteristics of watermelon to the water and nutrient uptake and translocation capacity of the root system”
The same questions in other papers
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2 papers in the same direction as this paper
- no effect
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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.