Pigeon Pea and Cowpea-Based Cropping Systems Improve Vesicular Arbuscular Mycorrhizal Fungal Colonisation of Subsequent Maize on the Alfisols in Central Malawi

Table 2

Pearson correlations between colonisation percentages and plant tissue P concentration, P uptake, total dry matter yields, BNF/plant, nodule number, and nodule dry weights for year one.

Crop	VAM colonisation (%) and parameters	Lilongwe		Dowa
			P value		P value
PP	% P	0.395	0.293	0.185	0.634
	P uptake	0.349	0.365	0.488	0.182
	TDM	0.170	0.661	0.045	0.909
	BNF	0.191	0.623	0.188	0.627
	Nodule number	0.067	0.861	0.577	0.154
	Nodule dry weight	0.368	0.330	0.470	0.202
CP	% P	0.252	0.513	0.379	0.290
	P-uptake	0.645	0.061	0.557	0.120
	TDM	0.067	0.864	0.660	0.053
	BNF	0.630	0.069	0.479	0.193
	Nodule number	0.155	0.689	0.657	0.055
	Nodule dry weight	0.438	0.238	0.650	0.058
MZ	% P	0.659		0.558	0.283
	P-uptake	0.455	0.138	0.210	0.352
	TDM	0.378	0.226	0.101	0.521

Note. Correlations were only presented for level of VAM fungal colonisation (%) against the other parameters; = significant at P < 0.05; = correlation coefficient; CP = cowpea; MZ = maize; PP = pigeon pea; Nod = nodule; TDM = total dry matter yield.