ANBAR JOURNAL OF AGRICULTURAL SCIENCES

Abstract

This experiment was condueted in Al-Anbar University coolege of Science. during autum season 2004, to study the effects of water stress and organic matter on some morphological and physiological properties, of sorghum plant. The experiment included the following treatment:
1- Soil water stress (soil moisture tension) with three percentages 25, 50 and 75% of water availability.
2- Organic matter from aquatic plant with levels 0.000 , 250 and 500 gm - vase.
Soil type : tow soils were used with different textures.
Factorial experiment was used according to completely randomized design (C.R.D.) with three replicates for each treatment. Plastic containers were used (capacity of 8 kg) with dried. and filled with sieved soils. Seeds of sorghum were planted on July - 2nd - 2004. Irrigation was done according to volumetric method to protect soil moisture stresses of the water availability percentage 25, 50 and 75%. The study continued up to December - 15th - 2004. The usage of water consumption by sorghum was calculated according to quantities of water applied for whole the period of growth season. Yield was harvested on December - 30th - 2004. Some morphological and physiological properties of plant were measured, plant hight, leaf area, yeild of dry amaterial and root, Chlorophyll a, b, total contents of chliorophyll, charbohydrat content, protein content and contents of N.P.K. in grain. The result can be summarized as follows:-
1- The interference between water stress and organic matter affected significantly most properties of plants. The treatments of water deficit 25% and 250 gm - vase of organic matter were the best, while the treatment with the water stress 75% and without organic matter was less than others.
2- Clay loam soil was recognized as compared with the sandy loam soil by increase most other studied characters.