Abstract
A field experiment was conducted to investigate the effect of supplementary irrigation on watermelon (Citullus lanatus) yield, water-use efficiency (WUE) and root distribution in gravel-mulched field in northwest Loess Plateau, China, during 2001 and 2002 growing seasons. The results showed that gravel mulch significantly improved seedling emergence, increased yield and WUE, and alleviated the influence of drought on plant growth. Regardless of gravel mulch application, supplementary irrigation increased watermelon yields, average fruit weight and number of fruit, especially yield increased as the amount of irrigation increased (P0.05). Generally, WUE of irrigated treatments were higher than that of non-irrigation treatment in gravel-mulched field. The effect of water supply on root distribution was different in two years. In 2001, average root length density (RLD) and root weight density (RWD) whole the soil profile increased. In 2002, however, RLD and RWD decreased as water supply increased. The average RLD and RWD in 2001 were significantly higher than those in 2002. Maybe we can interpret the phenomenon with the theory that there is a need to optimize root distribution (in terms of water relations) and aboveground biomass for a given water supply.The yield may not depend as much on root growth as on the amount of water required at critical stages. A significant effect of soil depth on RLD and RWD were observed in both years, but did not rapidly decrease with depth.
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Claims 10
Claim · model-written summary
Gravel mulch significantly improved watermelon seedling emergence in gravel-mulched field.
- Taxon
- watermelon
Citrullus lanatuse0 - Treatment
- gravel mulche1
- Outcome
- seedling emergencee1
- Direction
- improvede1
- Setting
- gravel-mulched fielde0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“watermelon (Citullus lanatus) yield, water-use efficiency (WUE) and root distribution in gravel-mulched field in northwest Loess Plateau, China”
e1“gravel mulch significantly improved seedling emergence”
Claim · model-written summary
Gravel mulch increased watermelon yield and water-use efficiency.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- gravel mulche1
- Outcome
- yield and WUEe1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“watermelon (Citullus lanatus) yield, water-use efficiency (WUE) and root distribution in gravel-mulched field in northwest Loess Plateau, China”
e1“gravel mulch significantly improved seedling emergence, increased yield and WUE”
Claim · model-written summary
Gravel mulch alleviated the influence of drought on watermelon plant growth.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- gravel mulche1
- Outcome
- influence of drought on plant growthe1
- Direction
- alleviatede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“watermelon (Citullus lanatus) yield, water-use efficiency (WUE) and root distribution in gravel-mulched field in northwest Loess Plateau, China”
e1“gravel mulch significantly improved seedling emergence, increased yield and WUE, and alleviated the influence of drought on plant growth”
Claim · model-written summary
Supplementary irrigation increased watermelon yields, average fruit weight and number of fruit.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- supplementary irrigatione2
- Outcome
- yields, average fruit weight and number of fruite2
- Direction
- increasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“watermelon (Citullus lanatus) yield, water-use efficiency (WUE) and root distribution in gravel-mulched field in northwest Loess Plateau, China”
e2“supplementary irrigation increased watermelon yields, average fruit weight and number of fruit, especially yield increased as the amount of irrigation increased”
Claim · model-written summary
Watermelon yield increased as the amount of supplementary irrigation increased.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- amount of irrigatione2
- Outcome
- yielde2
- Direction
- increasede2
- Qualifier
- as the amount of irrigation increasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“watermelon (Citullus lanatus) yield, water-use efficiency (WUE) and root distribution in gravel-mulched field in northwest Loess Plateau, China”
e2“especially yield increased as the amount of irrigation increased”
Claim · model-written summary
Water-use efficiency of irrigated treatments was higher than that of the non-irrigation treatment in gravel-mulched field.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- irrigated treatmentse3
- Outcome
- WUEe3
- Direction
- highere3
- Comparator
- non-irrigation treatmente3
- Setting
- gravel-mulched fielde3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“watermelon (Citullus lanatus) yield, water-use efficiency (WUE) and root distribution in gravel-mulched field in northwest Loess Plateau, China”
e3“Generally, WUE of irrigated treatments were higher than that of non-irrigation treatment in gravel-mulched field”
Claim · model-written summary
In 2001, average root length density and root weight density increased over the whole soil profile.
- Taxon
- watermelonCitrullus lanatuse0
- Outcome
- root length density (RLD) and root weight density (RWD)e4
- Direction
- increasede4
- Qualifier
- whole the soil profilee4
- Setting
- 2001e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“watermelon (Citullus lanatus) yield, water-use efficiency (WUE) and root distribution in gravel-mulched field in northwest Loess Plateau, China”
e4“In 2001, average root length density (RLD) and root weight density (RWD) whole the soil profile increased”
Claim · model-written summary
In 2002, root length density and root weight density decreased as water supply increased.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- water supplye5
- Outcome
- RLD and RWDe5
- Direction
- decreasede5
- Setting
- 2002e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“watermelon (Citullus lanatus) yield, water-use efficiency (WUE) and root distribution in gravel-mulched field in northwest Loess Plateau, China”
e5“In 2002, however, RLD and RWD decreased as water supply increased”
Claim · model-written summary
Average root length density and root weight density in 2001 were significantly higher than in 2002.
- Taxon
- watermelonCitrullus lanatuse0
- Outcome
- RLD and RWDe6
- Direction
- highere6
- Comparator
- those in 2002e6
- Setting
- 2001e6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“watermelon (Citullus lanatus) yield, water-use efficiency (WUE) and root distribution in gravel-mulched field in northwest Loess Plateau, China”
e6“The average RLD and RWD in 2001 were significantly higher than those in 2002”
Claim · model-written summary
Soil depth had a significant effect on root length density and root weight density in both years, without a rapid decrease with depth.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- soil depthe7
- Outcome
- RLD and RWDe7
- Qualifier
- did not rapidly decrease with depthe7
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“watermelon (Citullus lanatus) yield, water-use efficiency (WUE) and root distribution in gravel-mulched field in northwest Loess Plateau, China”
e7“A significant effect of soil depth on RLD and RWD were observed in both years, but did not rapidly decrease with depth”
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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.