ertilizers are a costly input but continue to make a significant contribution to the production of additional food. To maximize benefits and minimize nutrient loss from fertilizer, it must be used in the right amount, source and combination at the right time using the suitable method. The experiment was carried out during the 2018/2019 summer season in Mariout, Desert Research Center Agricultural Experiment Station, southwest of Alexandria, Egypt to study the effect of the inoculation with Mycorrhizal (MF) fungi, Humic Acid (HA) applied to soil at levels (0, 8 and 16 kg fed -1 ) and phosphorous foliar application as phosphoric acid (H 3 PO 4 72.5% P 2 O 5 ) at rates of (0, 0.75 and 1.5 ml/ l) on the yield, yield components and chemical composition of pearl millet (Pennisetumgalaucum L.). Results revealed that inoculation of pearl millet by Mycorrhizae, combined with application humic acid (16 kg/fed) and phosphoric acid (1.5ml/l) was the most effective treatment in improving fresh and dry forage yield which recorded (80.9 and 21.3 ton/fed), respectively through the whole season and recorded the highest protein content which was 24.3% for the 3 rd cut compared with other cuts. The inoculation of pearl millet by Mycorrhizae, combined with application humic acid (16 kg/fed) was the most effective treatment in improving dry matter and starch 31.1and 23.7% respectively, as the mean for three cuts. Also, this treatment recorded the highest values of nitrogen as concentration and uptake 2.65% and 184.7 kg N/fed as soon as, phosphorus concentration and uptake values 0.46% and 32.9 kg P 2 O 5 /fed respectively, as the mean for three cuts in the dry forage of pearl millet.Regarding yield, there was an increase in forage yield and nutrient uptake, especially P and Nand total antioxidants. Increasing rates of humic and phosphoric acid addition with mycorrhizae treatments increased total antioxidant activity (TAA) of leaf. TAA recorded the highest in the H 2 and P 2 with inoculation about 796, 663 and 425 (µg AAE/mg ext.) in 1 st , 2 nd and 3 rd cuts respectively.These results indicated a marked improvement in the nutrient availability status of calcareous.
Biostimulants are products that increase plant growth, resistance to water and abiotic stresses. it compositions, such as humic acids, amino acids, Ascorbic acids and other compounds. These substances cause changes in fundamental and structural processes to influence plant growth through enhanced tolerance to abiotic stresses and increase grain yield. The objectives of the present study were to investigate the effect of the foliar application of amino, humic and ascorbic acids with mineral fertilizers on growth, yield and chemical composition of wheat. The filed investigation was carried out at Baloza Research Station of the Desert Research Center, North Sinai, Egypt during the two successive seasons of 2019/2020. The experiment was conducted in a split plot design, with three replicates. The results obtained the yield components, total antioxidants, total phenol and nutrients concentration of wheat were increased with increasing the organic acids and antioxidants rates. The beneficial effect of treatments was arranged descending by as follows; ascorbic acid (antioxidants) > amino acids > humic acid > control. The most effective treatment was Am 2 AS 2 with hum 2 (ascorbic acid at 600 ppm) with amino and humic acids (at 600 ppm), which achieved 3.4 ton/fed grains of wheat. The foliar application of antioxidants recorded higher increases of yield parameters and nutrients content in straw and grains of wheat than amino acids and humic acid, while the humic acid showed the lowest effect.
A field experiment was carried out in winter season 2019 using broad bean. This study is to evaluate the effect of P and K as Nano fertilizes as foliar application at rate 0, 250 and 500 ppm for P, and 0, 150 and 300 ppm of K on the growth and the productivity of broad bean grown in sandy soil at Baloza Station-North Sinai of the Desert Research Center, Egypt, located at 31 3ʹ 0" N32 36ʹ 0" E. The treatments (P) and (K) were added as foliar spray after 25, 50 and 75 (DFS). Results indicated that the yield components of broad bean were improved with increasing P application. The K application took the same behavior of P where the spraying 500 and 300 ppm of P and K respectively, showed the higher effect on the yield parameters than the other levels. The nutrients concentration increased with increasing rates application of P and K which gave higher values than control treatment. Also N, P and K uptake had the same behavior as nutrients concentration where they affected significantly by spraying plants with P and K. The most efficient treatment was found when using the third rate of both nano P and K fertilizers which achieved 2.457, 1.470 and 3.927 ton fed -1 of straw, seeds and biological yield of broad bean, respectively. With increasing foliar application nano fertilizes of P and K single or in combination slightly increased the amount of N, P and K in soil after harvesting.
rrigation period is one of the significant factors affecting the growth, productivity, and yield of tomato plants. The study of increasing the period irrigation on tomato production is an important study of the effect of drought. The present investigation was carried out during the seasons of 2020/2021 in newly reclaimed arid land in the Agricultural Experimental Station of the Desert Research Center at Baloza Station, North Sinai Governorate (31° 32 03 N and 32° 362 03 E). The experimental results indicated that the increase in irrigation periods and foliar spraying foliar with silicon and microbial rhizobia in addition to the recommended doses of mineral fertilizers led to an increase in the yield of fresh and dry yield of tomato fruit and the nutrients content of leaves and fruits significantly increased. The average of tomato fruits accumulated in excess of biomass as total protein and total antioxidant content were increased by foliar spraying with silicon and also by inoculation of roots of the seedling by rhizobia. Proline content and water usage efficiency (WUE) in fruits were enhanced by various irrigation regimes. In comparison to the control, the irrigation water use efficiency (WUE) and proline content rose with the application of silicon and rhizobia but with less irrigation time. The microbial densities and activity under drought stress were boosted by the simultaneous application of silicon and rhizobia. It is notable that, soil dehydrogenase increased significantly with increasing irrigation period from 60 to 120 min, the highest mean values (1.031 μmol triphenyl formazan/g dry soil) were recorded at 120 min of field capacity of water requirement.
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