Feeding value of enset (<i>Ensete ventricosum</i>), <i>Desmodium intortum</i> hay and untreated or urea and calcium oxide treated wheat straw for sheep

Nurfeta, Ajebu; Tolera, Adugna; Eik, Lars Olav; Sundstøl, F.

doi:10.1111/j.1439-0396.2007.00784.x

Cited by 26 publications

(23 citation statements)

References 28 publications

(51 reference statements)

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“…The morphological differences between wheat straw char particles were related to the inorganic compounds allocation in the wheat straw as it was observed by Knudsen [41]. Pseudostem has a very high calcium content [59], whereas the wheat straw leaves contain high amounts of silicon and potassium [61,60]. Furthermore, the distribution of plant cell constituents in the biomass was also proposed to affect the formation of near-spherical char particles.…”

Section: Tablementioning

confidence: 79%

Comparison of high temperature chars of wheat straw and rice husk with respect to chemistry, morphology and reactivity

Trubetskaya

Jensen

et al. 2016

Biomass and Bioenergy

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Si solid-state NMR Entrained flow reactor Oxygen reactivity Si bearing compounds a b s t r a c t Fast pyrolysis of wheat straw and rice husk was carried out in an entrained flow reactor at hightemperatures (1000e1500) C. The collected char was analyzed using X-ray diffractometry, N 2 -adsorption, scanning electron microscopy, particle size analysis with CAMSIZER XT, 29 Si and 13 C solid-state nuclear magnetic resonance spectroscopy and thermogravimetric analysis to investigate the effect of inorganic matter on the char morphology and oxygen reactivity. The silicon compounds were dispersed throughout the turbostratic structure of rice husk char in an amorphous phase with a low melting temperature (z730 C), which led to the formation of a glassy char shell, resulting in a preserved particle size and shape of chars. The high alkali content in the wheat straw resulted in higher char reactivity, whereas the lower silicon content caused variations in the char shape from cylindrical to near-spherical char particles. The reactivities of pinewood and rice husk chars were similar with respect to oxidation, indicating less influence of silicon oxides on the char reactivity.

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Section: Tablementioning

confidence: 79%

Comparison of high temperature chars of wheat straw and rice husk with respect to chemistry, morphology and reactivity

Trubetskaya

Jensen

et al. 2016

Biomass and Bioenergy

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“…The intake of digestible OM and N were highest at higher levels of supplementation for both pseudostem and corm diets, which may have increased the supply of available N and energy. Moreover, DM degradability (Nurfeta et al., 2008b) and non‐fibre carbohydrate content (Nurfeta et al., 2009) of corm was higher than that of pseudostem. The quantity, quality and degradability of the carbohydrate and N components influence the activity of ruminal micro‐organisms and diet utilization (NRC, 1985).…”

Section: Discussionmentioning

confidence: 95%

“…Sheep on corm diets consumed all corm offered except at 200 g Desmodium , but there was refusal in the case of pseudostem diets, although the amounts offered were less than that of corm. Similarly, when fed as sole diet the intake of pseudostem was lower than corm and wheat straw (Nurfeta et al., 2009). Low DM intake in pseudostem diets might be due to the high moisture content in this part of enset (Table 1).…”

Section: Discussionmentioning

confidence: 99%

“…Highest apparent digestibility was observed at 100 g of supplementation for corm diet, whereas the corresponding level was at 200 g for pseudostem diets. The different response to graded level of supplementation for pseudostem and corm diet might be caused by the variation in chemical composition (Table 1) and non‐fibre carbohydrate content (Nurfeta et al., 2009). Consistent with the current results of increased DM, OM, ADF and NDF apparent digestibility up to 200 g of supplementation in pseudostem diets, Tolera and Sundstøl (2000a) observed significant increase in DM, OM and NDF digestibilities with increasing levels of Desmodium hay supplementation in sheep fed a basal diet of maize stover.…”

Section: Discussionmentioning

confidence: 99%

“…Desmodium intortum hay may overcome the N deficiency in pseudostem and corm, whereas these enset fractions provide energy in the form of starch and sugars. When fed alone, the intake of pseudostem and corm was poor (Nurfeta et al., 2009) but supplementing with small quantities of D. intortum (100 g) hay improved the nutrient utilization (Nurfeta et al., 2008c) with modest weight gain. For efficient utilization of enset and to achieve reasonable response, it is important to examine the optimum level of Desmodium hay supplementation to either pseudostem or corm diets.…”

Section: Introductionmentioning

confidence: 99%

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Digestibility and nitrogen utilization in sheep fed enset (Ensete ventricosum) pseudostem or corm and graded levels of Desmodium intortum hay to wheat straw-based diets

Nurfeta

2010

Journal of Animal Physiology and Animal Nutrition

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The aim of this study was to investigate the effects of different levels of Desmodium intortum (Desmodium) hay supplementation in sheep fed fixed amounts of enset pseudostem or corm and a basal diet of wheat straw on intake, digestibility and nitrogen utilization. Eighteen male sheep with a mean (± SD) live weight of 20.5 ± 1.45 kg were assigned to six treatments in a completely randomized design and fed either 108 g dry matter (DM) enset pseudostem or 165 g DM enset corm each with three levels (100, 200 and 300 g) of hay supplementation. For the pseudostem diets, there was no significant difference in total DM intake. Total crude protein (CP) intake and N retention increased with increasing levels of hay in both pseudostem and corm diets. The apparent digestibility of DM, OM, CP, acid detergent fibre and neutral detergent fibre (NDF) and microbial nitrogen supply (MN) at 100 g was lower that other levels of supplementation. For the corm diets, total DM and OM intake and MN supply increased with increasing levels of hay. The digestibility decreased (p < 0.001) with increasing levels of supplementation. The results suggest that at least 300 g (395 g/kg dietary DM) of Desmodium hay is required in pseudostem diets, whereas 200 g (337 g/kg dietary DM) may be sufficient in corm diets for efficient nutrient utilization.

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Distribution of phosphorus in size fractions of sandy soils with different fertilization histories

Geisseler

Linsler

Piegholdt

et al. 2011

Z. Pflanzenernähr. Bodenk.

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A major challenge in sustainable crop management is to ensure adequate P supply for crops, while minimizing losses of P that could negatively impact water quality. The objective of the present study was to investigate the effects of long-term applications of different levels of mineral fertilizers and farmyard manure on (1) the availability of P, (2) the relationship between soil C, N, and P, and (3) the distribution of inorganic and organic P in size fractions obtained by wet sieving. Soil samples were taken from the top 20 cm of a long-term (29 y) fertilization trial on a sandy Cambisol near Darmstadt, SW Germany. Plant-available P, determined with the CAL method, was little affected by fertilization treatment (p < 0.05) and was low to optimal. The concentration of inorganic and organic P extracted with a NaOH-EDTA solution (P NaOH-EDTA ) averaged about 350 mg (kg dry soil) -1 , with 42% being in the organic form (P o ). Manure application tended to increase soil C, N, and P o concentrations by 8%, 9%, and 5.6%, respectively. Across all treatments, the C : N : P o ratio was 100 : 9.5 : 2 and was not significantly affected by the fertilization treatments. Aggregate formation was weak due to the low clay and organic-matter content of the soil, and the fractions > 53 lm consisted predominantly of sand grains. The different fertilization treatments had little effect on the distribution of size fractions and their C, N, and P contents. In the fractions > 53 lm, P NaOH-EDTA ranged between 200 and 300 mg kg -1 , while it reached 1260 mg kg -1 in the fraction < 53 lm. Less than one third of P NaOH-EDTA was present as P o in the fractions > 53 lm, while P o accounted for 70% of P NaOH-EDTA in the smallest fraction (< 53 lm). Therefore, 16% and 28% of P NaOH-EDTA and P o , respectively, were associated with the smallest fraction, even though this fraction accounted for < 5% of the soil mass. Therefore, runoff may cause higher P losses than the soil P content suggests in this sandy soil with a weak aggregate formation. Overall, the results indicate that manure and mineral fertilizer had similar effects on soil P fractions.

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Feeding value of enset (Ensete ventricosum), Desmodium intortum hay and untreated or urea and calcium oxide treated wheat straw for sheep

Cited by 26 publications

References 28 publications

Comparison of high temperature chars of wheat straw and rice husk with respect to chemistry, morphology and reactivity

Comparison of high temperature chars of wheat straw and rice husk with respect to chemistry, morphology and reactivity

Digestibility and nitrogen utilization in sheep fed enset (Ensete ventricosum) pseudostem or corm and graded levels of Desmodium intortum hay to wheat straw-based diets

Distribution of phosphorus in size fractions of sandy soils with different fertilization histories

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