Evaluation of the Nutrient Status of Some Hydrophytes in the Water Courses of Nile Delta, Egypt

Table 5

Nutritive value of the above-ground living (L) and dead (D) parts of the studied species in relation to different seasons. DCP: digestible crude protein, TDN: total digestible nutrients, DE: digestible energy, ME: metabolized energy, NE: net energy and GE; gross energy.

Variable		DCP%	TDN%	DE Mcal kg^−1	ME Mcal kg^−1	NE Mcal kg^−1	GE Kcal 100g^−1
	Echinochloa stagnina
Winter	L	2.8±1.2	68.1±1.1	2.5±0.0	2.1±0.0	1.1±0.0	384.8±7.5
	D	0.9±0.1	66.7±0.1	2.5±0.0	2.1±0.0	1.1±0.0	393.0±3.9
Spring	L	0.9±1.1	64.2±3.5	2.6±0.3	2.1±0.2	1.1±0.1	381.5±9.8
	D	0.1±0.2	62.0±6.4	2.3±0.1	1.9±0.1	1.0±0.0	369.9±7.5
Summer	L	1.5±1.8	66.7±1.5	2.5±0.2	2.1±0.1	1.1±0.1	388.6±3.9
	D	1.0±1.0	63.1±3.8	2.3±0.2	1.9±0.2	1.0±0.1	385.9±13.0
Autumn	L	1.4±1.2	66.7±1.2	2.8±0.3	2.3±0.3	1.2±0.1	386.3±6.4
	D	0.6±0.8	61.±6.7	2.4±0.1	2.0±0.1	1.0±0.1	391.3±20.7
Annual mean	L	1.7±0.8	66.4±1.6	2.6±0.1	2.2±0.1	1.1±0.1	385.3±2.9
	D	0.7±0.4	63.4±2.3	2.4±0.1	2.0±0.1	1.0±0.1	385.0±10.5
F-value	L	ns	ns	ns	ns	ns	ns
	D	ns	ns	ns	ns	ns	ns
	Eichhornea crassipes
Winter	L	0.4±0.4	51.4±1.4	2.4±0.1	2.0±0.1	1.0±0.0	345.5±8.0
	D	0.0±0.0	51.5±2.0	2.4±0.2	2.0±0.2	1.0±0.1	357.0±12.7
Spring	L	3.7±0.9	50.3±1.5	2.5±0.4	2.1±0.5	1.1±0.2	347.4±7.3
	D	0.0±0.0	64.3±0.5	2.1±0.1	1.7±0.1	0.9±0.0	346.4±6.0
Summer	L	8.0±2.0	57.5±5.8	2.4±0.3	2.0±0.2	1.0±0.1	356.8±18.0
	D	0.0±0.0	55.9±7.5	2.3±0.2	1.9±0.1	1.0±0.1	355.5±5.4
Autumn	L	11.3±4.7	57.7±8.0	2.6±0.1	2.1±0.1	1.1±0.1	387.0±29.0
	D	0.0±0.0	60.7±8.2	2.2±0.2	1.8±0.1	0.9±0.1	324.7±42.0
Annual mean	L	5.9±4.8	54.2±3.9	2.5±0.1	2.1±0.1	1.1±0.1	359.2±19.2
	D	0.0±0.0	58.1±5.6	2.3±0.1	1.9±0.1	1.0±0.1	345.9±14.9
F-value	L	15.07^***	4.86*	ns	ns	ns	ns
	D	—	—	—	—	—	—
	Ceratophyllum demersum
Winter		8.7±0.5	45.4±4.8	1.8±0.1	1.5±0.1	0.8±0.0	330.2±10.4
Spring		8.4±1.2	49.4±4.8	1.9±0.1	1.6±0.1	0.8±0.0	339.9±16.6
Summer		11.3±3.2	49.6±5.6	2.1±0.1	1.7±0.1	0.9±0.1	357.0±10.2
Autumn		10.5±2.8	49.9±8.0	2.0±0.2	1.6±0.2	0.8±0.1	333.2±33.4
Annual mean		9.7±1.4	48.6±2.1	2.0±0.1	1.6±0.1	0.8±0.1	340.1±11.9
F-value		ns	ns	5.42*	5.38*	5.47*	ns

^∗𝑃<.05, ^∗∗𝑃<.01, ^∗∗∗𝑃<.001, and ns: insignificant difference (P > .05).