Toxicity to Seedlings of Nitrite in Sterilized Composts

Birch, Penny; Eagle, D. J.

doi:10.1080/00221589.1969.11514315

Cited by 5 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Foliar sprays might be one strategy to cope with nutrient deficiencies caused by poor uptake [36]. The toxic effects of NO 2 − to plants are well known and have been described previously [37][38][39]. However, it has been reported that concentrations up to 100 mg L −1 , which was the maximum concentration applied in this study, did not affect growth adversely [40].…”

Section: Discussionmentioning

confidence: 46%

Utilizing Anaerobic Digestates as Nutrient Solutions in Hydroponic Production Systems

2020

View full text Add to dashboard Cite

Moving food production into the urban and peri-urban areas is one way of facilitating a closed-loop approach, integrating waste handling with food production in order to recirculate nutrients and at the same time reduce the use of mined and fossil resources in the production. Using anaerobic digestion as a way of converting urban wastes to an energy source (methane) and a nutrient-rich biodigestate with subsequent use as fertilizer for food production seems like a feasible approach. However, utilizing urban wastes in plant production systems implies some challenges, such as high salinity of the waste, imbalanced composition of nutrients, and abundance of less favorable forms of nitrogen. In a series of experiments, these problems were addressed. Vegetables (Pak Choi) were cultivated hydroponically in a controlled climate. Experiments included increased salinity, elevated levels of nitrite, and different concentrations of the biogas digestate-based nutrient solution, with mineral based solutions as controls. In general, the mineral controls yielded around 50% higher fresh biomass than the organic solutions. However, the quality of the produce with respect to content of secondary metabolites such as vitamins was enhanced when the plants were cultivated with organic nutrient solutions. Increasing the concentration of NaCl to 241 mg Cl L−1 did not negatively affect plant performance. Increasing the concentration of nitrite negatively affected plant growth, with reductions in biomass production by up to 50%. Given this well-functioning nitrification process that did not result in high nitrite concentrations, the use of anaerobic digestates seems feasible for hydroponic production of vegetables.

show abstract

Section: Discussionmentioning

confidence: 46%

Utilizing Anaerobic Digestates as Nutrient Solutions in Hydroponic Production Systems

2020

View full text Add to dashboard Cite

show abstract

“…'Himalaya' barley, 'Red Kidney 5082' 3 bush bean, and atra zine resistant and susceptible pigweed were grown in con trolled environment chambers. All plants were grown in 23 by 30-cm polyethylene dishpans with perforated bottoms con taining 9 cm vermiculite and watered daily as previously de scribed (19).…”

Section: Methodsmentioning

confidence: 99%

“…Such a differential effect could be expected since nitrite reductase is localized within the chloroplast (5,16,17) and utilizes fer redoxin as an electron source (9), whereas nitrate reductase is localized in the cytoplasm (5,16,17) and utilizes NADH as an electron donor (2). Nitrite is toxic to many plant species and causes symptoms such as leaf yellowing, chlorosis, necrosis, distortion and eventually death (3,8,15).…”

Section: Introductionmentioning

confidence: 99%

Effect of Herbicides on In Vivo Nitrate and Nitrite Reduction

1977

View full text Add to dashboard Cite

The effects of herbicides on in vivo nitrate and nitrite reduction were determined by vacuum infiltrating sections of barley (Hordeum vulgareL.) or bean (Phaseolus vulgarisL.) leaves with solutions containing nitrate and herbicides. Herbicides causing a reduction of nitrite accumulation in the dark were considered to have inhibitory effects upon nitrate reduction and those causing an accumulation of nitrite in the light were considered to inhibit nitrite reduction. Only dinoseb (2-sec-butyl-4,6-dinitrophenol) and potassium azide significantly reduced nitrate reduction in both barley and bean. All of the herbicides which inhibit photosynthesis inhibited nitrite reduction but had no significant effect on nitrate reduction in barley and bean. Nitrite reduction in an atrazine [2-chloro-4-(ethylamino)-6-(isopropylamino)-s-triazine] resistant pigweed (Amaranthus retroflexusL.) biotype was not affected by any triazine tested. However, these triazines significantly inhibited nitrite reduction in barley, bean, and the susceptible pigweed biotype. The results suggest that the in vivo nitrate reductase technique may be a useful technique for identifying chemicals which inhibit the flow of electrons to ferredoxin, thereby inhibiting nitrite reduction in light.

show abstract

“…Pemberian urea sebanyak 5 g N/pot menyebabkan tanaman tidak tumbuh akibat kandungan N terlalu tinggi. Menurut Birch and Eagle (1969) urea dengan dosis tinggi melepaskan N yang tinggi ke tanah sehingga mengakibatkan kandungan N di dalam tanah terlalu tinggi yang menyebabkan keracunan bagi tanaman. Bila urea ini dikombinasikan dengan kompos kotoran ayam maka tanaman menghasilkan buah dengan bobot yang tidak berbeda dengan kompos kotoran ayam saja, tetapi bila urea dikombinasikan dengan kompos pemotongan sapi maka bobot buah segar yang dihasilkan lebih rendah dibandingkan dengan kompos pemotongan sapi saja.…”

Section: Tomat-okraunclassified

Effect of three different nitrogen fertilizers on several vegetable crops

1970

View full text Add to dashboard Cite

Applications of three different sources of N fertilizers (urea, compost from slaughter house and chicken manure compost) on vegetable crops (tomato, okra and spinach) were conducted in the green house of Research Institute for Food Crop Biotechnology, Bogor from August of 1999 to April of 2000. Treatments consisted of: (i) without fertilizer, (ii) 5 g N/pot of urea, (iii) 10 g N/pot of slaughter house compost, (iv) 10 g N/pot of chicken manure compost, (v) 5 g N/pot of urea + 10 g N/pot of slaughter house compost, and (vi) 5 g N/pot of urea + 10 g N/pot of chicken manure compost. Completely Randomized Design with 3 replicates was used in the experiments. In the first experiment, tomatoes were planted in the first season, following by okra in the second season. In the second experiment, spinach was planted for 6 times. Urea and compost were applied only once at the beginning of the experiment. Results of the experiments showed that for the first experiment, the highest N-uptake for tomatoes and okra was obtained from the treatment 5 g N/pot of urea + 10 g N/pot of chicken manure compost, although the highest fresh weight of tomatoes and okra fruits were not from this treatment. The treatment of 10 g N/pot of either slaughter house or chicken manure composts gave the highest fresh fruits weight. In the second experiment, the highest dry weight and N-uptake of spinach were obtained from the treatment of 5 g N/pot of urea + 10 g N/pot of chicken manure compost. Â© 2006 Jurusan Biologi FMIPA UNS SurakartaKey words: urea, compost, tomato (Lycopersicon esculentum Mill.), okra (Abelmoschus esculentus L. Moench), spinach (Amaranthus tricolor)

show abstract

Toxicity to Seedlings of Nitrite in Sterilized Composts

Cited by 5 publications

References 0 publications

Utilizing Anaerobic Digestates as Nutrient Solutions in Hydroponic Production Systems

Utilizing Anaerobic Digestates as Nutrient Solutions in Hydroponic Production Systems

Effect of Herbicides on In Vivo Nitrate and Nitrite Reduction

Effect of three different nitrogen fertilizers on several vegetable crops

Contact Info

Product

Resources

About