Boron Nutrition and Boron Application in Crops

Goh, K. J.; Gan, H. H.; Kee, K. K.; Chew, P. S.; Teoh, K.C.

doi:10.1007/978-1-4020-5382-5_20

Cited by 7 publications

(17 citation statements)

References 12 publications

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“…The variations in nutrient concentrations among vegetative tissues found in this study were consistent with previous studies [2,4,5,17,18,21,43]. These results confirm that the uptake of nutrients cannot be reliably deduced from leaf nutrient analysis alone, as high concentrations of nutrients are also found in other vegetative tissues such as rachis, petiole, leaf bases, and trunk.…”

Section: Nutrient Concentrations and Nutrient Demandsupporting

confidence: 92%

“…Much higher nutrient concentrations found in the cabbage were expected and have been documented [2,21]. This plant part is the growing point of the palm, so it is not surprising to observe a much higher concentration of nutrients here, as more nutrients are required to grow developing tissues, such as immature leaves and leaf bases.…”

Section: Nutrient Concentrations and Nutrient Demandsupporting

confidence: 59%

“…The amounts of nutrients immobilized by leaf bases and recycled back to the soil through shedding of leaf bases could be significant [45]. The low nutrient concentrations found in the roots have been reported [2,4,5,21].…”

Section: Nutrient Concentrations and Nutrient Demandmentioning

confidence: 99%

“…Other studies have been limited to determining the nutrient content of tenera bunches [19,20]. In one rare study, the micronutrient boron requirement of 20-82 month-old tenera was investigated [21]. Since then, there have been no such investigations carried out to determine the nutrient demand of tenera of different ages.…”

Section: Introductionmentioning

confidence: 99%

“…This has raised concerns, since updated knowledge of nutrient requirements at various stages of tenera growth is essential for formulating fertilizer recommendations that meet agronomic, economic, and environmental objectives [22]. Goh et al [21] found that 20-to-82-month-old tenera required about 27% more boron than dura of the same age. Tarmizi and Mohd Tayeb [6] found that N and K contents in tenera bunches were higher than those in dura bunches by 5% and 6%, respectively, but the P and Mg contents were 16% lower than those in dura bunches.…”

Section: Introductionmentioning

confidence: 99%

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Standing Biomass, Dry-Matter Production, and Nutrient Demand of Tenera Oil Palm

Siang¹,

Wahid²,

Teh

2022

Agronomy

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Recent advances in oil-palm breeding and agronomic practices may have influenced the dry-matter production and nutrient demand of tenera oil palm since the last comprehensive studies published some three decades ago. This has raised concerns, since updated knowledge of nutrient requirements at various stages of oil palm growth is essential for formulating fertilizer recommendations that meet agronomic, economic, and environmental objectives. We therefore filled in this knowledge gap with the objective to quantify the standing biomass, dry-matter production, and nutrient demand of tenera oil palm of different ages, grown under current agronomic practices. Tenera palms were sampled at 12, 29, 48, 88, 133, 209, and 238 months since nursery planting and separated into spear leaves, leaflets, rachis, petiole, leaf bases, cabbage, trunk, bole, and roots attached to bole for determination of dry weights and nutrient contents. Fruit bunches were harvested, with dry weights and nutrient contents of ripe bunches determined. Annual dry-matter production was calculated from dry weights of different plant parts, and together with nutrient concentrations determined in these plant parts and fruit bunches, annual nutrient demand was calculated. Excluding roots, the total standing vegetative biomass increased almost linearly from 1.3 kg palm−1 at 12 months old to 808.6 kg palm−1 at 238 months old. Whole-palm dry-matter production increased with palm age but at a decreasing rate, from 1.5 kg palm−1 year−1 at 12 months old to 285.5 kg palm−1 year−1 after 133 months, with little increase thereafter. The maximum rates of nutrient demand occurred after 209 months, coinciding with peak production of fruit bunches—except for K, which occurred at month 88 when vegetative growth demand for K peaked. Annual gross amounts of nutrients required to produce 25 t fresh fruit bunches ha−1 were 1.99 kg N, 0.28 kg P, 3.94 kg K, 0.42 kg Mg, 0.99 kg Ca, and 2.5 g B per palm. The net amounts of nutrients required to meet similar production level of fruit bunches were 1.04 kg N, 0.16 kg P, 1.85 kg K, 0.26 kg Mg, 0.47 kg Ca, and 1.3 g B per palm per year if all nutrients contained in the pruned leaves were recycled. These results provide much-needed updated data on the dry-matter production and nutrient demand of tenera oil palm grown under current agronomic practices and also serve as a general yardstick for practitioners to further refine fertilizer recommendations.

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Section: Nutrient Concentrations and Nutrient Demandsupporting

confidence: 92%

Section: Nutrient Concentrations and Nutrient Demandsupporting

confidence: 59%

Section: Nutrient Concentrations and Nutrient Demandmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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