Print ISSN: 2077-5822

Online ISSN: 2618-1479

Keywords : compost


Effect of Salinity and Compost on Some Enzymes Activity in Rizhosphere of Bean and Tomato Plants

Luma S.J.Al-Taweel; Radi K.Al-Rashidi

Al-Qadisiyah Journal For Agriculture Sciences, 2016, Volume 6, Issue 1, Pages 37-57
DOI: 10.33794/qjas.2016.110161

The aim of this study is to discover the activity of extracellular enzymes (amidase , alkaline phosphatase and Arylsulphatase) in vertical and horizontal developing directions of rhizosphere (0-5 and 5-10) cm . The plot experiment is performed in college of Agriculture / Al-Qadissiya University for the spring season 2013 ,the loamy sand soil was used to cultivate Tomato (Lycopersicon Esculentum mill) and Bean (Phaseolus Vulgaris L.) plants under salinity levels (without salted the natural salinity) , 6 , 8 and 10 ds.m-1 and compost levels (0,10 ,20)T.h-1 , and their interactions randomized complete design (RCD) is used with three replicates used with L.S.D test 5% level .The laboratory experiment is performed to determine the all enzymes activity above for all treatments .

The results are summarized as :
1- Enzyme activity decreases with increasing the salinity levels for all enzymes used in this study and the salinity level 10 ds.m-1 is the lowest. The arrangement of activity values as
Alkaline Phosphatase  Amidase  Arylsulphatase
2- The enzyme activity increased with increasing the added compost level 20Ton.h-1 and its interactions with salinity levels , and it has positive role to reduce the negative effect of salinity and it increases the activity in all treatments as well as the dead plant treatments .
3- The enzymes activity varied in rhizosphere developing directions and the plants are different in the site of highest activity , the enzyme activity in horizontal rhizosphere developing direction is highest than the vertical direction .
4- The enzyme activity in Tomato rhizosphere is the higher than Bean rhizosphere in all enzymes without the alkaline phosphatase in all rhizosphere vertical and horizontal directions .

The Effect of Salinity and Compost on CO2 Released from Rhizospher of Bean and Tomato Plants

Radi . K.Al-Rashidi; Luma .S.J.Al-Taweel

Al-Qadisiyah Journal For Agriculture Sciences, 2015, Volume 5, Issue 2, Pages 1-14
DOI: 10.33794/qjas.2015.108679

The aim of this research is to study CO2 released in vertical and horizontal developing directions of rhizosphere (0-5 and 5-10) cm . The plots experiment is performed in college of Agriculture / Al-Qadissiya University for the spring season 2013 ,the loamy sand soil has been used and cultivated Tomato (Lycopersicon Esculentum mill) and Bean (Phaseolus Vulgaris L.) plants under salinity levels (without salted (the natural salinity) , 6 , 8 and 10) ds.m-1 and compost levels (0,10 ,20)T.h-1 , and their interactions randomized complete design (RCD) is used with three replicates as compared with L.S.D test 5% level .
The soil has been incubated under the same treatments and the interactions in vertical and horizontal developing directions of rhizosphere for both plants under incubated periods (2 , 4 ,7 and 14) day for calculated the CO2 released .
The results are summarized as follows :
1- The highest quantities of CO2 released are in salinity level 6ds.m-1 and decreases with the increasing of salinity levels and the lowest in the 10ds.m-1 level for both plants .
2- The adding compost levels leads to an increase of CO2 released , the CO2 released quantities are varied in vertical and horizontal rhizosphere developing and the CO2 released quantities in horizontal rhizosphere developing are highest than the vertical direction for both plants .

The Effect of Partial Acidulated Phosphate Rock and Compost on Availability (Triticum aestivum L .)of Phosphorand Growth of Wheat

Dunya Faeq Munaf; Mohammed Abid Al-Robaiee

Al-Qadisiyah Journal For Agriculture Sciences, 2015, Volume 5, Issue 1, Pages 94-108
DOI: 10.33794/qjas.2015.103164

A greenhouse pots experiment has been carried out using silty clay loam soil collected from Agronomy department field/College of Agriculture / University of Baghdad to study the behavior and effects of adding different phosphate sources and compost on wheat growth and soil content of phosphor in two stages of wheat growth (tillering& spikes formation). Wheat seeds Triticumaestivum L. are grown in 26/11/2013. Completely randomized block design (CRD) has been used and three mineral phosphate sources، phosphate rock PR (Ecashat region، Iraq),partial Acidulated phosphate rock PR (40 %) (PAPR) and Tri super phosphate (TSP) has been added at one rate (100 kg. p. ha-1 ) by mixing with soil before planting with two levels of compost 0 and 20 mega gram.ha-1 .The available soil phosphor and wheat growth parameters such as plant height , number of tillers , dry weight of vegetation and root plants and total dry weigh of plant are measured at tillering stage and spikes formation stage.
The results show that addition of the mineral phosphate sources and compost and their interaction show significant increases in soil available phosphor values. TSP addition gives the best significant differences followed by PAPR while addition of the phosphate rock does not give asignificant difference compared with the control at the two wheat growth stages. The percentages of increases in the average of the soil available phosphor are 32.7% , 12.81% at tillering and spikes formation stages in TSP and PAPR treatments respectively, and 46.7% , 42.8 % at tillering and spikes formation stages respectively when compost was added and 13. 61% at tillering stage and 11.4 %at spikes formation stage in interaction of compost with TSP. The addition of the mineral phosphate sources and compost and together show positive significant effects in most of growth parameters such as plant height ,tillers number and roots dry weight at spikes formation stage and total dry weight of plant , weight of straw at tillering and spikes formation stages .The TSP treatment is the best followed by PAPR treatment in increasing the last growth parameters compared with PR at which non-significant increases are recorded .