A field experiment was carried out to investigate the effects of organic
fertilizers (mushroom substrate residues, poultry manure and city compost)
and mineral fertilizers (NPK) on some properties and productivity of a
calcareous soil using chard
(Beta vulgaris) as a test crop. The plant was
cultivated at spring season 2009. The first cut was after 60 days of swing. The
results of experiment were: The NPK fertilizer significantly affected dry weight
of plant yield (157.6g/m2soil) and the efficiency of fertilizer in productivity was
50.8% compare to control (104.5g/m2soil). The treatment of 50% NPK + 50%
poultry manure gave the highest yeld compare to other treatments. However
the organic treatments did not differ significantly among them. Concentrations
of NPK nutrients in plant leaves were as follows: NPK > 50% NPK + 50%
poultry manure > poultry manure > 50% NPK + 50% mushroom substrate >
mushroom substrate > 50% NPK + 50% city compost > city compost. The
organic fertilizers decreased the NPK in plant and soil compare with NPK
fertilizer treatment. However there was no significant differences between NPK
treatment yield and 50% NPK + 50 % poultry manure treatment. It was
concluded that the use of 50% NPK +50 % orgnic fertilizer (specially poultry
manure) was important to get best result.
A field experiment was carried out in Hout research station- Agriculture research center in
Swaida – General Commission For Scientific Research Agricultural during the growing
season of 2015-2016 to study the effect of different levels of deficit i
rrigation with
different levels of town refuse compost (TRC)on some morphological parameters and the
productivity of lettuce and compare it with the common mineral fertilizers.
The experiment was designed as a split block design with three levels of irrigation, each
level has four fertilizing treatments and control with three replicates.
The research has studied the plant height (H), the number of its leaves (N) ,the leaf area
(LAL), the plant's leaves area (LAP), the leaves area index (LAI), in addition to the lettuce
head's fresh weight and the total productivity of the planted area.
The irrigation and fertilizing interaction results indicate to the obvious positive effect of
the organic additions on the productivity parameters and the efficiency of deficit irrigation,
and the significant superiority of T11 treatment in all of the measured parameters in
compare with the other treatments with an increased final yield of %169 comparing with
T15 and % 428 comparing with T35.
The results also indicate to the possibility of saving %25 of the consumed amount of
irrigation water by using TRC instead of mineral fertilizer , and reveal that the organicmineral
combination achieved a better yield with percentages of ( 29- 44 – 53 )%
comparing with single mineral fertilizer in the three studied irrigation levels (T1-T2-T3)
respectively.
These results give the farmer a wide range of possibilities to choose what suits his
available productivity needs , and a clear idea about the expected yield according to the
chosen treatment.
An experiment was conducted in fields of Agricultural Research office / Al-Dibuni Research Station in Clay Loam soil, to
study the coexistence with irrigation salinity using different water qualities with a recommended mineral fertilizer by the Ira
qi
Ministry of Agriculture, and evaluate the role of this fertilizer in maintaining the nutritional balance in soil and barley
productivity. A Factorial Experiment Design was used According to RCBD design. The results showed that mineral
fertilization of 100% fertilizer recommendation was significantly superior in all measured characteristics (nitrogen and
phosphorus availability in soil, EC, plant height, leaf area, number of branches, 1000 grain weight, grain yield, biological
yield and harvest index) which gave (46.31, 27.29 mg kg-1
, 5.59 dSm-1
, 67.44 cm, 20.41 cm2
plant-1
, 7.66 branch plant-1
,
44.08g, 3.16, 11.19 Mg ha-1
, and 28.24%, respectively) compared with control treatment. The addition of irrigation different
types affected on the measured characteristics, as the S1 treatment gave a significant values in each of (nitrogen and
phosphorus availability in soil, EC, leaf area, number of branches, 1000 grain weight, grain yield, biological yield and harvest
index) which gave (40.27, 23.39 mg kg-1
, 5.10 dSm-1
, 16.97 cm2
plant-1
, 6.91 branch plant-1
, 40.31 g, 3.02, 10.13 Mgha-1
, and
29.98%) compared with S2 treatment. The results showed the double interaction F4S3 treatment had a significant effect in all
the measured characteristics(nitrogen and phosphorus availability in soil, leaf area, number of branches, 1000 grain weight,
grain yield, biological yield and harvest index) which gave (48.61 and 28.97mg kg-1
and 20. 92 cm2
plant-1
, 8.06 branch plant-
1
, 45.75g, 3.22, 11.47 Mgha
-1
, and 28.07%, respectively) compared with F1S2 treatment, noting F4S3 treatment did not
significantly of F4S1 treatment.
