Abstract
Between November 1991 and 1993, 4 consecutive vegetable crops (sweetcorn, cabbage, potato, and cabbage) were grown in Lincoln, New Zealand. The treatments included spent mushroom substrate (SMS, a by-product of the mushroom industry) applications before each crop at rates of 0, 20, 40, or 80 t/ha (moist), both with and without 1 rate of inorganic fertiliser for each crop (120-338, 40-100, 53-100, and 60-114 kg/ha, respectively, of nitrogen, phosphorus, potassium, and sulfur). SMS applications caused a rapid increase in soil inorganic N concentration, but after this it had a variable effect. There was some evidence of N immobilisation following initial SMS applications of 20 t/ha. SMS applications increased both soil pH and CEC, whereas inorganic fertiliser decreased both. Sweetcorn and cabbage yields were increased by SMS when inorganic fertiliser was not used, and potato yield was increased irrespective of fertiliser use (i.e. yield increases of 38%, 82-96%, and 26-46%, respectively, for sweetcorn cob, cabbage head, and potato tuber fresh yields). Inorganic fertiliser increased crop yields by a greater amount than SMS. A lack of soil inorganic N was the major limitation to crop growth following SMS applications, so crops may require additional N with SMS.
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Claims 10
Claim · model-written summary
SMS rapidly increased soil inorganic nitrogen.
Not reportedTaxon
Verbatim
e0“SMS applications caused a rapid increase in soil inorganic N concentration”
t0“plant growth”
t1“plant growth”
Claim · model-written summary
There was evidence of nitrogen immobilization after initial 20 t/ha SMS applications.
Not reportedTaxon
Verbatim
e0“There was some evidence of N immobilisation following initial SMS applications of 20 t/ha.”
t0“plant growth”
t1“plant growth”
Claim · model-written summary
SMS increased soil pH and CEC.
- Treatment
- SMS applicationse0
- Outcome
- soil pH and CECe0
- Direction
- increasede0
- Comparator
- inorganic fertilisere0
Not reportedTaxon
Verbatim
e0“SMS applications increased both soil pH and CEC, whereas inorganic fertiliser decreased both.”
t0“plant growth”
t1“plant growth”
Claim · model-written summary
Inorganic fertilizer decreased soil pH and CEC.
- Treatment
- inorganic fertilisere0
- Outcome
- soil pH and CECe0
- Direction
- decreasede0
- Comparator
- SMS applicationse0
Not reportedTaxon
Verbatim
e0“SMS applications increased both soil pH and CEC, whereas inorganic fertiliser decreased both.”
t0“plant growth”
t1“plant growth”
Claim · model-written summary
SMS increased sweetcorn cob yield by 38% without inorganic fertilizer.
- Taxon
- Sweetcorne0
- Treatment
- SMSe0
- Outcome
- sweetcorn cobe0
- Direction
- increasede0
- Value
- 38%e0
- Qualifier
- inorganic fertiliser was not usede0
Not reportedComparator
Verbatim
e0“Sweetcorn and cabbage yields were increased by SMS when inorganic fertiliser was not used, and potato yield was increased irrespective of fertiliser use (i.e. yield increases of 38%, 82-96%, and 26-46%, respectively, for sweetcorn cob, cabbage head, and potato tuber fresh yields).”
Claim · model-written summary
SMS increased cabbage head yield by 82-96% without inorganic fertilizer.
- Taxon
- cabbage
Brassica oleracea var. capitatae0 - Treatment
- SMSe0
- Outcome
- cabbage heade0
- Direction
- increasede0
- Value
- 82-96%e0
- Qualifier
- inorganic fertiliser was not usede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sweetcorn and cabbage yields were increased by SMS when inorganic fertiliser was not used, and potato yield was increased irrespective of fertiliser use (i.e. yield increases of 38%, 82-96%, and 26-46%, respectively, for sweetcorn cob, cabbage head, and potato tuber fresh yields).”
Claim · model-written summary
SMS increased potato tuber yield by 26-46% regardless of inorganic fertilizer.
- Taxon
- potato
Solanum tuberosume0 - Treatment
- spent mushroom substratet1
- Outcome
- potato tuber fresh yieldse0
- Direction
- increasede0
- Value
- 26-46%e0
- Qualifier
- irrespective of fertiliser usee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“potato yield was increased irrespective of fertiliser use (i.e. yield increases of 38%, 82-96%, and 26-46%, respectively, for sweetcorn cob, cabbage head, and potato tuber fresh yields).”
t0“spent mushroom substrate”
t1“spent mushroom substrate”
Claim · model-written summary
Inorganic fertilizer increased crop yields more than SMS.
Verbatim
e0“Inorganic fertiliser increased crop yields by a greater amount than SMS.”
t0“plant growth”
t1“plant growth”
Claim · model-written summary
Lack of soil inorganic nitrogen was the main limitation to crop growth after SMS.
Verbatim
e0“A lack of soil inorganic N was the major limitation to crop growth following SMS applications”
t0“plant growth”
t1“plant growth”
Claim · model-written summary
Crops may need extra nitrogen with SMS.
Verbatim
e0“crops may require additional N with SMS.”
t0“plant growth”
t1“plant growth”
The same questions in other papers
growing medium · yield · Solanum tuberosum (potato)Positive and negative results
16 papers in the same direction as this paper · 2 in the opposite direction · 1 reporting no difference from an alternative
- negative
- negative
- no effect
16 papers more in this group
See all 20 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.