Abstract
Biodegradable municipal and farm waste compost application to agricultural land is increasing following the implementation of regulations which restrict the disposal of organic rich materials in landfills. Compost application, however, needs to ensure sustainable agricultural development. A field study was conducted on sandy loam soil to assess the agronomic benefit and the environmental risk from nitrate leaching following biowaste (containing kitchen, garden, paper and cardboard waste) and vegetable waste compost use in agriculture. The two composts were applied to forage maize production at three rates, ranging on average from 90 to 325 kg total N ha-1 yr-1. Mineral N fertilizer and non-amended soil was used for comparison. Forage maize response to compost application and mineral fertilization was limited in both years of application, as the soil itself met the N requirements of the crop, through the mineralization of soil inherent N. The monitoring of soil mineral N suggested that vegetable waste compost (C: N of 10.5) resulted in similar amounts of plant available N with mineral fertilizer N. Biowaste compost with C: N of 20 resulted in limited mineralization of compost N. In soils with high N mineralization potential applying biowaste compost resulted in lower risk of nitrate leaching. This study provided evidence to suggest that biowaste and vegetable waste compost use in agriculture can allow for the partial substitution of mineral fertilizer N and K. Following the repeated compost application in high rates, however, potential salinity or sodicity problems may rise.
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Claims 7
Claim · model-written summary
Forage maize response to compost application was limited in both years.
Not reportedComparator
Verbatim
e0“Forage maize response to compost application and mineral fertilization was limited in both years of application”
Claim · model-written summary
Forage maize response to mineral fertilization was limited in both years.
Not reportedComparator
Verbatim
e0“Forage maize response to compost application and mineral fertilization was limited in both years of application”
Claim · model-written summary
Vegetable waste compost gave similar plant-available nitrogen to mineral fertilizer.
- Treatment
- vegetable waste composte0
- Outcome
- plant available Ne0
- Direction
- similare0
- Qualifier
- C: N of 10.5e0
- Comparator
- mineral fertilizer Ne0
Not reportedTaxon
Verbatim
e0“vegetable waste compost (C: N of 10.5) resulted in similar amounts of plant available N with mineral fertilizer N.”
Claim · model-written summary
Biowaste compost with C:N of 20 had limited compost nitrogen mineralization.
- Treatment
- Biowaste composte0
- Outcome
- mineralization of compost Ne0
- Direction
- limitede0
- Qualifier
- C: N of 20e0
Not reportedTaxon
Verbatim
e0“Biowaste compost with C: N of 20 resulted in limited mineralization of compost N.”
Claim · model-written summary
Biowaste compost lowered nitrate-leaching risk in soils with high nitrogen mineralization potential.
- Treatment
- applying biowaste composte0
- Outcome
- risk of nitrate leachinge0
- Direction
- lowere0
- Qualifier
- soils with high N mineralization potentiale0
Not reportedTaxonComparator
Verbatim
e0“In soils with high N mineralization potential applying biowaste compost resulted in lower risk of nitrate leaching.”
Claim · model-written summary
The authors suggest compost can partly substitute for mineral nitrogen and potassium fertilizers.
- Treatment
- biowaste and vegetable waste composte0
- Outcome
- partial substitution of mineral fertilizer N and Ke0
Not reportedTaxon
Verbatim
e0“biowaste and vegetable waste compost use in agriculture can allow for the partial substitution of mineral fertilizer N and K.”
Claim · model-written summary
Repeated high-rate compost application may cause salinity or sodicity problems.
- Treatment
- repeated compost application in high ratese0
- Outcome
- potential salinity or sodicity problemse0
- Direction
- may risee0
Not reportedTaxon
Verbatim
e0“Following the repeated compost application in high rates, however, potential salinity or sodicity problems may rise.”
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fertilization · organism · Zea mays (maize)Results differ
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