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The experiment was conducted at the teaching and Research farm of the
Federal University Wukari Taraba State, Nigeria to assess, evaluate and
compare the effect of organic fertilizers such as poultry manure, cow
dung, organic manure and in-organic fertilizers such as NPK and urea on
the growth and tuber yield of sweet potato. The recommended rates of cow
dung (10t/ha) poultry manure (10t/ha), organic manure (10t/ha)
NPK15:15:15 (400kg/ha) and urea (200kgN/ha) were applied as treatment to
sweet potato with a control at (0kg/ha). These were arranged in a
randomized complete block design with three replications. Measurement
were taken on the growth and tuber yield at harvest such as the length
of primary vein, number of secondary vein number of leaves, number of
tuber and tuber weight. Data collected were analyzed using (ANOVA) and
the significant means separated using Duncan multiple difference at 5%
probability level. The result revealed or showed that numbers of leaves
were significant in all the treatments. Application of urea fertilizer
produced the highest number of tuber per plant, while tuber weight was
not significantly different, but poultry manure application had the
higher mean value of (2.34kg). It was concluding that application of
poultry manure as organic fertilizer are better and can compare readily
with inorganic fertilizer (urea) in the production of sweet potato.
Sweet potato is one of the most important field crop in the world and
many studies have been carried out on the growth, productivity and
nutritional properties including the effect of organic and inorganic
fertilizers applications.The study therefore compares the effectiveness
of available organic and inorganic fertilizer on the growth and tuber
yield of the crop.
Straw Composting with Biological Agent Inoculation and Application Biofertilizer to Increase Rice Production
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Betty Natalie Fitriatin , Tualar Simarmata , Hersanti . , Tienturmuktini . (2016). Straw Composting with Biological Agent Inoculation and Application Biofertilizer to Increase Rice Production. International Journal of Sustainable Agricultural Research, 3(3): 49-53. DOI: 10.18488/journal.70/2016.3.3/18.104.22.168
Problems using straw directly include the contamination of germs on the
straw from the previous crop. Alternatives that can be done are giving
inoculant of biological decomposers The purpose of the research to test
isolates decomposer in the rate of straw decomposition in soil and to
test isolates biofertilizer on rice plants in soil treated straw
compost. Greenhouse experiment was conducted for selecting isolates and
formulations decomposer consortium and biological agents as well as the
selection and formulation of biological fertilizers isolates. This
experiment was consisted of treatments, i.e. incubation time composting
(1, 2, 3, and 4 weeks) and inoculant (formulation A containing microbes
T. harzianum, Bacillus subtililis, Cytophaga sp. and Bacillus
licheniformis; i2 = Formulation B containing microbes B. subtililis,
Cytophaga sp., and B. licheniformis, Streptomyces sp.) The field
experiment was conducted to determine the effect of straw compost and
biofertilizer inoculants (nitrogen fixation bacteria and phosphate
solubilizing bacteria) on rice. Research at this stage using split plot
experimental design was repeated three times. The main plot was the
doses of straw compost + biofertilizer consisting of 8 treatments (0;
2.5; 5.0; 7.5 t ha-1 without and with biofertilizer 400 g ha-1). The
subplot was doses of inorganic fertilizer N, P and K consisting of 5
levels (100%, 90%, 80%, 70% and 60% of recommendations dosages). The
results showed that the A formulation containing T. harzianum, B.
subtililis, Cytophaga sp. and B. Licheniformis whereas B formulation
contains B. subtililis, Cytophaga sp., and B. Licheniformis,
Streptomyces sp. B formulation capable of decomposing straw is better
than A formulation. Application of straw compost and biofertilizer (5,0
t ha-1 + 400 g ha-1) could increase the yield of rice to 13.3% and
substitute 20% of inorganic fertilizer (N, P and K).
This study is one of very few studies which have investigated to obtain
decomposers consortium formulation which can be effective to straw
composting and to study the effect of biofertilizer inoculants on rice
plants in soil treated with straw compost.