Nitrate reductase activity in leaves and stems of tanner grass (Brachiaria radicans Napper)

Cazetta, Jairo Osvaldo; Villela, L. C. V.

doi:10.1590/s0103-90162004000600012

Cited by 29 publications

(7 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This result is in line with several reports, namely leaf NRA correlates with NO 3 content in soil and stem tissue [20]. Nitrogen sources such as NaNo 3 produced the highest of NRA compared to nitrogen sources of NH 4 Cl and Urea [21]. The increase in N accumulation in the root or leaf tissue by fertilization stimulated NRA in both leaves and roots 13 and 42%, respectively [22].…”

Section: Effect Of Npk Fertilizer Treatment Onsupporting

confidence: 92%

Effect of NPK Fertilization Method on the Physiology and Fruit Products of Myristica fragrans in North Maluku, Indonesia

Sulistiono¹,

Ibrahim²,

Suwitono³

et al. 2021

ARRB

View full text Add to dashboard Cite

Aims: The objective of this study was to determine the optimal fertilizing method and NPK fertilizer dosage for plant physiology and nutmeg yield. Study Design: The experimental design was a completely randomized block design (CRBD) in a 4x3 factorial arrangement with three replicates. The first factor was four NPK fertilizer doses: 1, 1.5, 2.0, and 2.5kg NPK (15:15:15)/tree/year. The second factor was the manner of fertilizer application: (1) fertilized in spot, (2) fertilized in-furrow trenches trunked and (3) fertilized in hole. Place and Duration of Study: The research was conducted in Tobelo North Halmahera (1°44'45.3"-1°44'54.4" N, 127°59'54.4"-127°59'53.2" E), North Maluku, Indonesia from January 2019 to May 2020. Methodology: The nutmeg trees used was 30 years old. The population of trees plants in the study area was 40 trees. Observation parameters on leaves are chlorophyll a, b and total, nitrate reductase activity (NRA), N, P, K, proline content, number of young and old fruits. Results: The fertilization treatment with the fertilizer application method into the crack/hole fertilizer with a dose of 2.5 kg NPK significantly produced high levels of chlorophyll a, chlorophyll b, total chlorophyll of leaves and old fruit. The number of old fruits is positively correlated with chlorophyll a content (0.615*), chlorophyll b (0.663*), total chlorophyll (0.634*) and number of young fruits (0.748 **). The application of fertilizer hole produces plants that recover quickly from drought stress, as evidenced by the highest proline content. Conclusion: NPK fertilization using the hole method and at doses of 2.0-2.5 kg/tree/year are recommended for improving plant physiology and yield.

show abstract

Section: Effect Of Npk Fertilizer Treatment Onsupporting

confidence: 92%

Effect of NPK Fertilization Method on the Physiology and Fruit Products of Myristica fragrans in North Maluku, Indonesia

Sulistiono¹,

Ibrahim²,

Suwitono³

et al. 2021

ARRB

View full text Add to dashboard Cite

show abstract

“…Activity of the enzyme nitrate reductase was measured in the fourth developed leaf from the apex of the plants with the nitrate N source. For this the leaves were collected between 10:00 and 11:00 h in the morning and soon after the analysis was performed in triplicate with the leaves in vivo according to the methodology proposed by (Cazetta and Villela, 2004).…”

Section: Methodsmentioning

confidence: 99%

Silicon and excess ammonium and nitrate in cucumber plants

Campos¹,

Prado²,

Caione³

et al. 2016

Afr. J. Agric. Res.

View full text Add to dashboard Cite

Excess ammonium and nitrate are associated with physiological disorders in plants; however, these disturbances can be minimized with the use of silicon, especially in plants supplied with ammonium. The objective of this study was to evaluate the effect of silicon on the presence of excess ammonium and nitrate in two cucumber varieties (Cucumis sativus) on physiology and growth of the plants. The experiment was carried out in hydroponic cultivated cucumber plants, at the São Paulo State University, Brazil. A completely randomized design was used with four replications, in a 2 × 3 × 2 factorial corresponding to two sources of nitrogen (ammonium and nitrate) at a concentration of 10 mmol L-1 , three silicon concentrations (0, 1 and 10 mmol L-1) and two varieties of cucumber (Tsubasa and Hokushin). At 28 days after treatment application, evaluations were performed for silicon and nitrogen accumulation in the shoots, green color index, number of stomata, nitrate reductase activity, height, leaf number and dry matter mass. Silicon promoted an increase in the growth variables and improved the physiological parameters of the plants only when supplying the ammonium N source. The use of Si, independent of the cucumber variety, mitigated the toxicity of ammonium, resulting in greater total nitrogen accumulation and dry matter of plants; however, it did not benefit the plants under excess nitrate nitrogen.

show abstract

“…The application of ammonium sulfate significantly increased the NRA in soybean. The assimilation of N involves the NRA, and its activity seems to be dependent on the N availability in the soil (Cazzeta and Villela, 2004). Application of ammonium sulfate as much as 100 kg ha -1 to corn significantly increases NRA by 79.430 mmol kg -1 h -1 FW in comparison to the without ammonium sulfate, with NRA value of 35.96 mmol kg -1 h -1 FW (Purbajanti et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

Optimizing application of biochar, compost and nitrogen fertilizer in soybean intercropping with kayu putih ( Melaleuca cajuputi )

Alam¹,

Suryanto²,

Handayani³

et al. 2020

Revista Brasileira De Ciência Do Solo

View full text Add to dashboard Cite

Waste resulted from the distillation of kayu putih leaves is a problem in almost all kayu putih refineries throughout Indonesia due to its enormous availability and un-utilization. It has potential to be used as an organic fertilizer source due to its nutrient content (macro and micro) which is higher than organic fertilizer from animals. The use of kayu putih waste is useful to complement and increase the efficiency of nitrogen fertilizer in soybean intercropping with kayu putih. This study aimed to determine the optimum values of kayu putih waste and nitrogen fertilizer based on three scenarios: economic, environmental, and eco-environmental. A two-year experiment (2018-2019) was carried out in a central composite design (CCD) with two replications as the response surface methodology (RSM) at the Menggoran Forest Resort, Playen District, Yogyakarta Forest Management, Indonesia. The treatments consist of biochar and compost levels made from kayu putih waste (0, 2.5, and 5.0 t ha-1) and nitrogen fertilizer levels supplied by ammonium sulfate (0, 50, and 100 kg ha-1) as independent variables. The observations conducted on nitrate reductase activity (NRA), total chlorophyll (TC), leaf photosynthesis rate (LPR), nitrogen loss (NL), nitrogen use efficiency (NUE), and seed yield (SY). The response variables were fitted in a full quadratic polynomial model. The results showed that the resource-based on the eco-environmental scenarios was the most favorable cropping strategy for the soybean production intercropping with kayu putih with the optimum value of 2.890 t ha-1 of biochar, 2.27 t ha-1 of compost, and 67.85 kg ha-1 of ammonium sulfate. This recommendation can reduce the use of ammonium sulfate by 32.

show abstract

Nitrate reductase activity in leaves and stems of tanner grass (Brachiaria radicans Napper)

Cited by 29 publications

References 25 publications

Effect of NPK Fertilization Method on the Physiology and Fruit Products of Myristica fragrans in North Maluku, Indonesia

Effect of NPK Fertilization Method on the Physiology and Fruit Products of Myristica fragrans in North Maluku, Indonesia

Silicon and excess ammonium and nitrate in cucumber plants

Optimizing application of biochar, compost and nitrogen fertilizer in soybean intercropping with kayu putih ( Melaleuca cajuputi )

Contact Info

Product

Resources

About