To distinguish among three lime media, they were arbitrarily named as lime 1, lime 2 and lime 3 [17, 18] (Table 1).These six different media were supplemented with different rates (0.007, 0.014, 0.021 and 0.028 ml/g) of different lipid sources for example groundnut, coconut, palm kernel, butterfat, palm and cotton oils, respectively in order to study the effect of lipids on carpophore production.
Mean stipe length, stipe and pileus diameter and carpophore dry weight of L.
The interaction of wheat and millet spawn, respectively with the various oils produced similar mean carpophore dry weights.
The same interaction induces the heaviest carpophore wet weight in P.
[12.] Nwanze PI, Khan AU, Ameh JB and VJ Umoh The effect of the interaction of various spawn grains with different culture media on carpophore dry weights and stipe and pileus diameters of Lentinus squarrosulus.
The objective of the present work is therefore to explain more fully the impact of soil on the productivity of Tuber melanosporum carpophores through a quantitative statistical estimation of the influence of conventional surface horizon properties (granulometric texture, pH, calcareous fractions, organic carbon, total nitrogen, exchangeable cations).
The maximum annual production of carpophores in Tuber melanosporum brules was evaluated as an expression of the greatest quantity (in g) of fresh carpophores picked that year.
The results show that active limestone had a positive and very significant impact on the production of carpophores in T.
Regarding the study of limestone, a simple, positive, and very significant correlation was found between the percentage of active limestone in the surface horizons and the production of Tuber melanosporum carpophores. Active limestone explained 40% of this variance.
In summary, conventional soil properties (granulometric texture, pH, calcareous fractions, organic carbon, total nitrogen, exchangeable cations) have a limited impact on the production of Tuber melanosporum carpophores, as they account for only 27% of production variance.