Abstract
A greenhouse experiment was carried out to evaluate the effects of applying organic materials and inoculation with Azospirillum sp. on dry matter production and nitrogen fixation of maize ( Zea mays) grown in a Podzol Hydromorphic soil of the rainforest zone of Pernambuco, north-east Brazil. The treatments consisted of the addition of organic materials of different origin (cow manure, solid vinasse, vermicompost and fruithorticultural compost) applied at levels of 0, 10 and 20 t/ha. Strain NFB 2, isolated from maize at the University Federal Rural of Pernambuco, and strain Sp 242, isolated from wheat at the Agrobiology Research Center — EMBRAPA, were applied individually to maize seedlings, and a control treatment without Azospirillum inoculation was included. Plants were cropped at 50 days after seedling transplant. Azospirillum inoculation as strain NFB 2 reduced total N accumulation, in the presence of applied organic material. Organic material addition increased the nitrogenase activity in the roots, and the fruit-horticultural compost (wider C:N ratio) showed the most pronounced effect on this parameter. The organic materials increased maize growth with the best responses at a rate of 20 t/ha. Index terms: Diazotrophics, C:N ratio, organic matters, cow manure, vermicompost, vinasse.
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Claims 5
Claim · model-written summary
NFB 2 inoculation reduced maize total nitrogen accumulation when organic material was applied.
- Treatment
- Azospirillum inoculation as strain NFB 2e0
- Interactor
- Azospirillum
Azospirillume0symbiont - Outcome
- total N accumulatione0
- Direction
- reducede0
- Qualifier
- in the presence of applied organic materiale0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize”
e0“Azospirillum inoculation as strain NFB 2 reduced total N accumulation, in the presence of applied organic material”
Claim · model-written summary
Organic material addition increased maize root nitrogenase activity.
- Organ / stage
- rootse0
- Treatment
- Organic material additione0
- Outcome
- nitrogenase activitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize”
e0“Organic material addition increased the nitrogenase activity in the roots”
Claim · model-written summary
Fruit horticultural compost had the strongest effect on root nitrogenase activity.
- Treatment
- fruit-horticultural composte0
- Outcome
- nitrogenase activitye1
- Direction
- most pronouncede0
- Qualifier
- wider C:N ratioe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize”
e0“the fruit-horticultural compost (wider C:N ratio) showed the most pronounced effect on this parameter”
e1“nitrogenase activity in the roots”
Claim · model-written summary
Organic materials increased maize growth.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The organic materials increased maize growth with the best responses at a rate of 20 t/ha”
Claim · model-written summary
Organic materials gave the best maize growth response at 20 t/ha.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The organic materials increased maize growth with the best responses at a rate of 20 t/ha”
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