Selectivity and Mechanism of Hydrogen Atom Transfer by an Isolable Imidoiron(III) Complex

This article discusses a mechanistic study of hydrogen atom transfer by an isolable iron (III) imido complex, LᴹᵉFeNAd (Lᴹᵉ = bulky β-diketiminate ligand, 2,4-bis(2,6-diisopropylphenylimido)pentyl; Ad = 1-adamantyl)

Growth and longevity of Pleurotus tuberregium (Fr.) Sing as affected by mixtures of decomposed palm bunch refuse and topsoil

Screen house study was conducted at the Rivers State University from April to July, 2006 to evaluate the effect of decomposed palm bunch and top soil mixture on the growth and longevity of P. tuberregium. The treatments consisted of top sol and decomposed palm bunch refuse in the following ratio T3 (4:1), T4 (3:2), T5 (2:3), T6 (1:4), T7 (1:1). The treatments were laid out in a completely randomized design (CRD) with three replications. ). The treatments were bagged in 75x60cm perforated black polythene bag and watered daily. Growth was observed from 14 days after planting. No growth were observed on T2 (decomposed palm bunch refuse) T3 (4:1) and T4 (3:2). Results of this study revealed that T6 (1:4) gave the highest emergence 4.47%, highest numbers of shoots (47), regular harvesting per week and highest life span of 73 days. T6 (1:4) is recommended amongst the various ratios for higher emergence percentage, number of shoots, frequency of harvesting and longevity. From the above result we can conclude that using proper ratios of decomposed palm bunch and top soil increases the production of mushroom. It should be used where emphasis is laid on increased production of fruiting bodies in mushroom cultivation. One part decomposed palm bunch refuse and 4 parts topsoil by weight is then recommended for increased production of Pleurotus tuberregium.Keywords: Sclerotia, P. tuberregium, decomposed palm bunch refuse, topsoil, emergence, longevit

Effect of mixture of decomposed palm bunch and topsoil on yield and nutrient composition of Pleurotus tuberregium (Fr.) Sing

The research was carried out in the screen house at the Teaching and Research Farm of Rivers State University, Port Harcourt from April to July 2016. It investigated the effect of mixtures of decomposed palm bunch refuse and topsoil on the growth yield, and nutrient composition of Pleurotus tuberregium (Fr) singer. The substrates/treatments were various mixtures of decomposed palm bunch and topsoil: T1 (0:5), T2 (5:0), T3(4:1), T4(3:2), T5(2:3), T6(1:4) and T7(1:1). These treatments were replicated three times and fitted to the complete randomized design. Samples collected from each treatment were analyzed for soil particle size, pH, organic carbon content, total nitrogen, available phosphorus, exchangeable cations (k+, mg2+, Na+, Ca2+) before and after cultivation of sclerotia. Data collected showed no growth was on T2 (decomposed palm bunch only), T3(4:1) and T4(3:2). Results of the study revealed that T1(topsoil only) gave the highest wet and dry weight of 356.87g and 62.37g respectively. This was followed by T6(1:4) with wet and dry weight of 191.95g and 31.43g respectively. There were no significance differences in moisture content, % ash, ether extract, crude protein, crude fibre and carbohydrate content of mushroom harvested from T1(topsoil) and T6(1:4). It was therefore observed that amongst the control used, topsoil gave the best yield and nutrient content while T6(1:4) gave the highest yield and nutrient content amongst the various mixtures used. Cultivation of P. tuberregium using one part decomposed palm bunch and 4 parts topsoil by weight, is recommended.Keywords: Nutrient, palm bunch refuse, Pleurotus tuberregium , topsoil, yiel