Abstract
This study aimed to (i) evaluate phytotoxicity, (ii) and quality of two composts, based on plant yield and nitrogen use efficiency of Japanese watercress (Nasturtium officinale}). The germination index (GI) of seeds of mung bean (Vigna radiata L.) was used to assess the phytotoxicity of compost extracts (1:10, w/v) at 0, 10, 20 and 30 days after composting. A separate field experiment growing Japanese watercress was arranged in a randomized complete block design (RCBD) with five treatments and three replications. The treatments were: NT1 (soil only), NT2 (100% NPK chemical fertilizer), NT3 (100% compost A), NT (100% compost B) and NT5 (100% commercial micro-organic fertilizer). Treatments from NT2 –NT5 received the same amount of total applied nitrogen. The results showed that composts in the preliminary study reduced the phytotoxicity of the raw materials by improving the GI from 49% to 58% - 90%. Total dissolved solids in compost A and the heavy metals concentration in compost B were both lower than permissible limits but could be responsible for limiting root growth. Two composts A and B in the experiment gave a comparative vegetable yield (1663.2 - 1762.2 kg/1000 m2) to chemical fertilizer, but significantly lower (P < 0.01) than commercial micro-organic fertilizer (2476.3 kg/1000 m2). After 25 days of fertilizer application, the plants used half of the total N from chemical fertilizer or commercial micro-organic fertilizer, which was twice as many as those from two composts.
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Claims 5
Claim · model-written summary
Composting improved mung bean germination index from 49% to 58%–90%.
- Taxon
- mung bean (Vigna radiata L.)
.jpg?width=60)
Vigna radiatat0 - Treatment
- compostse0
- Outcome
- GIe0
- Direction
- improvinge0
- Value
- 58% - 90%e0
- Qualifier
- 49%e0
- Comparator
- raw materialse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“composts in the preliminary study reduced the phytotoxicity of the raw materials by improving the GI from 49% to 58% - 90%”
t0“seeds of mung bean (Vigna radiata L.)”
Claim · model-written summary
Composts A and B gave watercress yields of 1663.2–1762.2 kg/1000 m2, comparable to chemical fertilizer.
- Taxon
- Japanese Watercress (Nasturtium officinale)
Nasturtium officinalet0 - Treatment
- composts A and Be0
- Outcome
- vegetable yielde0
- Direction
- comparativee0
- Value
- 1663.2 - 1762.2 kg/1000 m2e0
- Comparator
- chemical fertilizere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two composts A and B in the experiment gave a comparative vegetable yield (1663.2 - 1762.2 kg/1000 m2) to chemical fertilizer”
t0“Japanese Watercress (Nasturtium officinale)”
Claim · model-written summary
Composts A and B produced significantly lower watercress yield than commercial micro-organic fertilizer.
- Taxon
- Japanese Watercress (Nasturtium officinale)Nasturtium officinalet0
- Treatment
- composts A and Be1
- Outcome
- vegetable yielde1
- Direction
- lowere0
- Qualifier
- 2476.3 kg/1000 m2e0
- Comparator
- commercial micro-organic fertilizere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but significantly lower (P < 0.01) than commercial micro-organic fertilizer (2476.3 kg/1000 m2)”
t0“Japanese Watercress (Nasturtium officinale)”
e1“Two composts A and B in the experiment gave a comparative vegetable yield (1663.2 - 1762.2 kg/1000 m2) to chemical fertilizer”
Claim · model-written summary
After 25 days, plants used half of the applied nitrogen from chemical or commercial micro-organic fertilizer, twice that from composts.
- Taxon
- Japanese Watercress (Nasturtium officinale)Nasturtium officinalet0
- Treatment
- chemical fertilizer or commercial micro-organic fertilizere0
- Outcome
- total Ne0
- Direction
- twice as manye0
- Value
- half of the total Ne0
- Qualifier
- After 25 dayse0
- Comparator
- two compostse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After 25 days of fertilizer application, the plants used half of the total N from chemical fertilizer or commercial micro-organic fertilizer, which was twice as many as those from two composts.”
t0“Japanese Watercress (Nasturtium officinale)”
Claim · model-written summary
The authors suggest dissolved solids in compost A and heavy metals in compost B could limit root growth.
- Taxon
- Japanese Watercress (Nasturtium officinale)Nasturtium officinalet0
- Outcome
- limiting root growthe0
- Qualifier
- Total dissolved solids in compost A and the heavy metals concentration in compost Be0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total dissolved solids in compost A and the heavy metals concentration in compost B were both lower than permissible limits but could be responsible for limiting root growth.”
t0“Japanese Watercress (Nasturtium officinale)”
The same questions in other papers
fertilization · growth · Vigna radiata (mung bean)Positive and negative results
139 papers in the same direction as this paper · 4 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- no effect
- no effect
141 papers more in this group
See all 145 papers →fertilization · nutrient: content · Nasturtium officinale (watercress)Results agree
1 paper in the same direction as this paper
- positive
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.