Agronomic Behaviour and Chemical Composition of Three Varieties of Pennisetum sp in the Peruvian Tropics

Table 3

Correlation values between chemical composition and agronomic behaviour according to age and Pennisetum sp. variety¹.

Variables	N (%)	P (%)	K (%)	Ca (%)	Mg (%)	Fe (mg/kg)	Cu (mg/kg)
Age
GC	−0.740	−0.507	−0.282	−0.557	0.28	−0.355	−0.100	HP
16 w	0.243	−0.314	−0.249	−0.12	−0.219	0.362	−0.628
12 w	0.272	−0.027	−0.221	0.278	0.2	0.596∗	−0.199
8 w	−0.205	0.151	−0.26	0.47	0.327	0.042	0.296
GC	0.218	0.264	−0.179	0.063	−0.082	−0.014	0.250	C
16 w	−0.479	−0.040	0.015	−0.387	−0.431	−0.326	0.439
12 w	0.018	0.248	−0.487	0.628	0.162	0.558	−0.519
8 w	0.102	0.041	−0.398	−0.450	0.070	−0.362	−0.093
GC	0.179	0.101	−0.268	0.311	−0.189	0.399	−0.111	T
16 w	−0.378	−0.224	−0.349	−0.373	−0.391	−0.197	−0.045
12 w	−0.016	0.007	−0.659	0.266	0.271	0.512	−0.411
8 w	−0.441	0.026	−0.312	0.452	−0.035	−0.12	−0.105
GC	−0.556	−0.197	−0.159	−0.331	0.31	−0.419	−0.006	B
16 w	0.217	0.078	−0.266	−0.03	0.371	0.294	−0.175
12 w	−0.162	0.263	0.255	−0.049	−0.338	−0.144	−0.243
8 w	−0.046	0.409	0.027	0.515	0.45	0.197	0.475
GC	−0.525	−0.346	−0.112	−0.472	0.268	−0.104	0.096	DM
16 w	0.406	0.43	0.37	0.113	0.027	−0.345	0.342
12 w	−0.07	−0.217	−0.122	−0.284	0.372	0.321	0.272
8 w	−0.263	0.092	−0.381	0.006	0.247	0.429	−0.051
GC	−0.006	0.073	0.236	−0.181	−0.018	−0.213	0.513	SLR
16 w	−0.142	0.575	0.401	−0.166	−0.133	−0.616	0.813
12 w	0.461	0.098	−0.204	0.277	0.17	0.074	−0.06
8 w	0.382	−0.437	0.562	0.264	−0.375	−0.296	−0.438
Variety
GC	−0.740	−0.507	−0.282	−0.557	0.28	−0.355	−0.100	HP
C	−0.758	−0.506	−0.149	−0.526	0.392	−0.242	−0.010
KG	−0.725	−0.406	−0.135	−0.628	0.373	−0.483	−0.628
M	−0.796	−0.645∗	−0.579	−0.781	0.184	−0.443	−0.410
GC	0.218	0.264	−0.179	0.063	−0.082	−0.014	0.250	C
C	0.027	0.243	0.228	0.077	−0.327	0.120	0.590∗
KG	0.227	0.226	−0.462	0.179	−0.093	0.157	0.007
M	0.392	0.502	−0.122	0.433	0.310	−0.163	0.354
GC	0.179	0.101	−0.268	0.311	−0.189	0.399	−0.111	T
C	0.423	−0.086	−0.680	0.152	−0.270	0.544	−0.113
KG	0.015	0.408	0.029	0.685	−0.316	0.331	−0.147
M	0.166	0.142	−0.146	0.342	0.173	0.388	−0.084
GC	−0.556	−0.197	−0.156	−0.331	0.310	−0.419	−0.006	B
C	−0.310	0.102	0.320	−0.177	0.379	−0.719	0.106
KG	−0.693	−0.408	−0.357	−0.537	0.500	−0.375	−0.578
M	−0.680	−0.392	−0.542	−0.699	0.170	−0.210	−0.389
GC	−0.525	−0.346	−0.112	−0.472	0.268	−0.104	0.096	DM
C	−0.845	−0.603	−0.164	−0.818	−0.181	0.036	0.022
KG	−0.422	−0.287	−0.091	−0.556	0.547	−0.602	−0.317
M	−0.605	−0.579	−0.509	−0.650	0.107	−0.346	−0.206
GC	−0.006	0.073	0.236	−0.181	−0.018	−0.213	0.513	SLR
C	−0.356	0.223	0.141	−0.351	−0.094	−0.255	0.857
KG	0.470	−0.023	0.486	0.099	−0.192	−0.241	0.106
M	−0.008	−0.010	0.200	−0.134	0.291	−0.071	−0.411

¹HP: plant height; C: coverage; T: tiller; B: biomass; DM: dry matter; SLR: stem/leaf ratio; C: Cameroon; KG: king grass; M: maralfalfa; GC: general correlation. ^∗Significant correlation according to Pearson's test ().