Abstract
Field experiment was conducted between 2016 and 2018 at Forestry Research Institute of Nigeria (FRIN), Humid Forest Research Station, Umuahia, South-east Nigeria, to study litter production and climatic influence in Allanblackia floribun- da (oliv) agroforestry system. The experiment was laid out in a randomized com- plete block design (RCBD) with three replications. Litter trays were used for monthly collection of leaf litter. Results indicated that soil chemical properties namely pH (H2O), organic matter, total nitrogen and potassium increased with tree age from 4.8%, 1.3%, 0.07% and 0.07 Cmol/kg respectively in 2016 to 5.8 %, 3.2%, 0.30% and 0.1 Cmol/kg respectively in 2017. The dry season months of November, December, January and February gave significantly higher leaf litter- fall (23.76 – 43.50 kg/ha in 2016/17 and 34.75 – 151.22kg /ha in 2017/18) than the rainy season months of April to October (4.96 – 14.53 kg/ha in 2016/2017 and 8.81 – 17.96 kg/ha in 2017/2018) cropping seasons. Leaf litter production positively and significantly correlated with maximum temperature (r = 0.60*) and (r = 0.70*) and negatively correlated with rainfall (r = -0.74**) and (r = -0.60*) and relative humidity (r = -0.86**) and (r = -0.79**) for 2017 and 2018 respec- tively, with a bimodal pattern showing leaf litter peak production in January and December. The high production of leaf litter during the dry season served as a protective cover for the soil against the scorching heat of the dry season sun.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 9
Claim · model-written summary
Soil pH increased with tree age from 4.8% to 5.8%.
Not reportedOrgan / stage
Verbatim
e0“soil chemical properties namely pH (H2O), organic matter, total nitrogen and potassium increased with tree age from 4.8%, 1.3%, 0.07% and 0.07 Cmol/kg respectively in 2016 to 5.8 %, 3.2%, 0.30% and 0.1 Cmol/kg respectively in 2017”
t0“A. Floribunda”
Claim · model-written summary
Soil organic matter increased with tree age from 1.3% to 3.2%.
Verbatim
e0“organic matter, total nitrogen and potassium increased with tree age from 4.8%, 1.3%, 0.07% and 0.07 Cmol/kg respectively in 2016 to 5.8 %, 3.2%, 0.30% and 0.1 Cmol/kg respectively in 2017”
t0“A. Floribunda”
Claim · model-written summary
Soil total nitrogen increased with tree age.
Verbatim
e0“total nitrogen and potassium increased with tree age”
t0“A. Floribunda”
Claim · model-written summary
Soil potassium increased with tree age.
Verbatim
e0“potassium increased with tree age”
t0“A. Floribunda”
Claim · model-written summary
Dry-season leaf litterfall exceeded rainy-season litterfall.
Verbatim
e0“dry season months of November, December, January and February gave significantly higher leaf litter- fall (23.76 – 43.50 kg/ha in 2016/17 and 34.75 – 151.22kg /ha in 2017/18) than the rainy season months of April to October (4.96 – 14.53 kg/ha in 2016/2017 and 8.81 – 17.96 kg/ha in 2017/2018)”
t0“A. Floribunda”
Claim · model-written summary
Leaf litter production correlated positively with maximum temperature.
Verbatim
e0“Leaf litter production positively and significantly correlated with maximum temperature (r = 0.60*) and (r = 0.70*)”
t0“A. Floribunda”
Claim · model-written summary
Leaf litter production correlated negatively with rainfall.
Verbatim
e0“negatively correlated with rainfall (r = -0.74**) and (r = -0.60*)”
t0“A. Floribunda”
Claim · model-written summary
Leaf litter production correlated negatively with relative humidity.
Not reportedDirection
Verbatim
e0“relative humidity (r = -0.86**) and (r = -0.79**)”
t0“A. Floribunda”
Claim · model-written summary
Litter production peaked in January and December.
Verbatim
e0“leaf litter peak production in January and December”
t0“A. Floribunda”