الفهرس 
Material and methodsOnly 14 pages are availabe for public view
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Abstract
Two field experiments were conducted at the Experimental
and Research Center, Faculty of Agriculture, Moshtohor, Zagazig
University, during 1992/1993 and 1993/1994 seasons. The aim of
this study to was investigate the effect of P and K fertilization and
various forage mixtures on the botanical composition, growth,
forage yield and chemical content of Egyptian clover.
The soil was a clay having an alkaline reaction (pH 8.1),
a.M. content 20/0 and available P 12 ppm and K 200 ppm.
Split plot design was used with four replications. Four
fertilization treatments (0, P, K and P+K) were randomly located
in the main plot and four various forage mixtures (Meskawy alone,
Meskawy with Fahl, ryegrass and barley) in the sub-plots.
Results could be summarized as follows:
A. Effect of fertilization treatments:
1. Fresh and dry weight percentages of Meskawy clover were
significantly increased with application of P, K and P+K
treatments in the 1S1cut in both seasons and dry weight % in
1992/1993 season and fresh weight«% in 1993/1994 season.
On the other hand, weeds % in the obtained forage was
significantly decreased in the 1st cut in both seasons with
adding P, K and P+K treatments.
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2. Fertilization treatments had no significant effect on the 2nd.
part of mixture % in the 1st.cut in both seasons.
3. Application of P, K and P+K treatments significantly
increased plant height, No. of branches/plant, fresh as well as a
dry weight of Meskawy plants and No. of stems/m2 in most
cuts in both seasons. Dry matter content of the obtained forage
mixture was significantly increased with adding fertlization
treatments in the three cuts in both seasons.
4. Application of P, K and P+K levels significantly increased
green as well as dry forage yield in all cuts and total forage
yields/fad.. However, the diference among P and P+K
treatments in most cuts in the tst season were insignificant.
Application of P, K and P+K treatments significantly
increased total dry forage yield over the control treatment by
46, 30, 540/0 in 1992/1993 season and 26, 23 and 36% in
1993/1994 season, respectively.
S. Applying 32 kg P205, 24 kg K20 and 32 kg P20S + 24 kg
K20/fad. significantly increased N, P and total carbohydrate
contents in all cuts of different Meskawy plant organs over the
unfertilizer treatment. The absolute amount of N, P, K and
carbohydrates in different plant organs in all cuts increased
with applying the same respective treatments.
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6. Total protein yield (kg/fad.) significantly increased by 80, 51
and 1320/0in 1992/1993 and by 66, 48 and 1220/0in 1993/1994
for the application of P, K and P+K levels, respectively. This
result indicated that the rate of 32 kg P20S + 24 kg K20/fad.
is recommended for forage yield and quality of Egyptian
clover.
B. Effect of various forage mixtures:
1. Mixing Meskawy cv. with Fahl cv., ryegrass and barley had
significantly decreased Meskawy’’ in its mixtures in the tsi
cut compared with Meskawy cv. alone. In the 2nd and 3m
cuts, Meskawy % in Meskawy-ryegrass mixtures produced the
lowest ones compared with the other mixing treatment or
Meskawy cv. alone.
2. Barley gave the highest percentage in Meskawy cv./bar1ey
mixture in the 1st cut. Whereas, the lowest one was ryegrass
0/0 in its mixture. In the 2nd.and 3m cuts, Italian ryegrass was
continus in the herbage. Whereas, Fahl cv. or barley was
absent in their mixtures.
3. The weeds weight from Meskawy alone was significantly
higher than that obtained from Meskawy cv. mixtures. On the
other hand, weed% were reduced in the 2nd and 3m cuts.
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4. Growth characters of Meskawy clover were significantly
affected by various forage mixtures. In general, Meskawy
alone gave the highest fresh weight of leaves, stems/plant and
total weight/plant, No. of stems/m2 and the lowest values in
plant height, No. of branches/plant and dry matter content.
Meskawy cv. with Fahl cv. or ryegrass mixtures recorded the
highest plant height, No. of branches/plant and dry matter
content. Meskawy cv.-barley mixture gave the lowest values of
plant height, No of branches/plant, No. of stems/m2 and fresh
as well as dry weight of different plant organs. However, the
difference between Meskawy cv. with Fahl cv., ryegrass and
barley mixtures in dry matter content in the 151cut in both
seasons was insignificant.
5. Green and dry forage yields in the 151cut were significantly
increased by mixing Meskawy clover with Fahl cv-, ryegrass
and barley compared with Meskawy alone. These increases in
dry forage yield for the respective species mixtures over
Meskawy alone were 50, 37 and 81% in 1992/1993 season and
by 26, 26 and 350/0in 1993/1994 season, respectively. In the
2nd and 3rd cuts, Meskawy cv. ryegrass mixture. In general,
Meskawy cv./ryegrass mixture produced the highest green and
dry forage yield and Meskawy cv./barley mixture gave the
lowest ones. The forage mixtures as a total dry forage yield
could be arranged in descending order as: Meskawy/ryegrass-
Meskawy/ Fahl-MeskawylbaFley-Meskawy alone.
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6- The various forage mixture improved the quality of Egyptian .
clover and its mixtures. Meskawy alone or MeskawylFahl
mixture increased N, P as well as absolute amount of these
elements in Meskawy plants and total protein yield compared
with Meskawy/grass mixtures. K content was not affected by
mixing treatments. Meskawy alone or with Fahl cv. mixture
gave the highest K uptake in different plant organs, and the
lowest values were obtained in Meskawy grass mixtures. In
general, total carbohydrate content in different Meskawy plant
organs was significantly increased by Meskawy/grass mixtures
compared with Meskawy alone or with Fahl cv.
C. Effect of the interaction:
1. The effect of the interaction between fertilization treatments
and forage mixtures was significant on:’ dry weight of
Meskawy clover % in the 1st cut in 199311994season, plant
height in the 2nd cut in 1993/1994 season, No. of
branches/plant in the 3rd. cut in 1993/1994 season, total dry
weight/plant in the 1st cut in 1992/1993 season, dry matter
content in the 1.s1cut in 1992/1993 season, green foage yield in
the 1st cut in 1992/1993 season and the 3rd cut in 1993/1994
season and total dry forage yield in both seasons.
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2. Also, nitrogen content In leaves/plant in the 2nd cut in
1992/1993 season, phosphorus, potassium and total
carbohydrates percentages -in leaves/plant in the 2nd cut in
1993/1994 season were significantly influenced by the
interaction between fertilization treatments and Meskawy
clover mixtures.