Management of soil and water in salt affected soils
Abstract: The aim of the present work was to improvement some chemical and physical properties of salt affected soils (clay soil) using organic manure “compost” and proline under deficit irrigation. Also fertilizer techniques (coating, soaking) were assessed.
The investigation included two field experiments. The first experiment concerns organic fertilizers: no compost "M0", 25 m3ha-1
"M1" and 75 m3 ha-1"M2"; irrigation treatments: irrigation upon 25% available moisture depletion (AMD), 50% AMD and 75% AMD I1, I2 and I3 respectively and proline treatments: (no spray "P0" and spray with proline "2 mg L-1.” "P1", 3 sprays 20,45 and 60 days post-seeding 1200Lha-1 each).The crop was sorghum The second experiment concerns P-fertilization ordinary superphosphate “6.7%P” techniques (no P-fertilizer, broadcast (Br) on soil surface than soaking (Sk) of seeds in a P-solution and coating of seeds). Two crops were used Sorghum(Sorghum vulgare) and Sudan grass(Sorghum vulgare) sudanrnsis). Two cuts were taken from each crop, 1st 60 days post-seeding and 2nd 60 days after that.
Experiments were conducted at South of Sahl El-Hosainiya Research Station, Agricultural Research Center in Sharkeia governorate.
Experment1
• Yield: Irrigation I2 surpassed I1 and I3 by 22 and 17% respectively for 1st cut yields; 25 and 12% respectively for 2nd cut. Manuring increased yields by 28 and 48% by “M1" and 1"M2"; respectively for 1st cut; 33 and 51% respectively for 2nd cut. Proline caused 9% increase in each cut. Lowest was by I1M0P0 and highest was by I2M2P1; 106-111% increase by the latter over the former.
• N uptake: Irrigation I2 surpassed I1 and I3 by 51and 44%, respectively for 1st cut N uptake; 31and 13% respectively for 2nd cut. Manuring increased N by 95and 159% by “M1" and 1"M2"; respectively for 1st cut; 106 and 161% respectively for 2nd cut. Proline caused 18 and 14 % increase in 1st and 2nd cut respectively. Lowest was by I1M0P0 and highest was by I2M2P1; 460-274% increase by the latter over the former.
• P uptake: Irrigation I2 surpassed I1 and I3 by 115 and 34%, respectively for 1st cut P uptake; 42 and 38% respectively for 2nd cut. Manuring increased P by 201and 389% by “M1" and 1"M2"; respectively for 1st cut; 116 and 207% respectively for 2nd cut. Proline caused 69 and 50% increase in 1st and 2nd cut respectively. Lowest was by I1M0P0 and highest was by I2M2P1; 532-503% increase by the latter over the former.
• K uptake: Irrigation I2 surpassed I1 and I3 by 31 and 32%, respectively for 1st cut N uptake; 33 and 23% respectively for 2nd cut. Manuring increased K by 145 and 235 % by “M1" and 1"M2"; respectively for 1st cut; 158 and 232% respectively for 2nd cut. Proline caused 25 and 20 % increase in 1st and 2nd cut respectively. Lowest was by I1M0P0 and highest was by I2M2P1; 542-475% increase by the latter over the former.
• Content of soil organic matter was increased by 18.4% by M2.
• Available N, P and K in the soil after at end of experiment were greater in treatments receiving manure irrigated upon depletion of 50% available water.
• Soil bulk density significantly decreased with application of organic manure.
• Total porosity, hydraulic conductivity, field capacity and available water significantly increased as a result of organic manure application.
• Yield of fresh and dry plant cuts(two cuts) in were highest with irrigation upon 50% depletion of water at 50%, (Organic manure at 75 m3ha-) and Proline spray.
• N, P and K-uptake increased with highest values begin obtained from treatments of I2 M2 P1.
Experment2
• Forage yield of Sudan grass and Sorghum increased upon application of P. Ranges of increase for fresh yield 1st cut were 26% given by Sk of Sudan grass and 112% for Sorghum. Second cut increases were 26 and 162%. Coating gave the highest yield, and increases were 82.3, 64.6 and 48.3 for 1st forage cut of Ct, Br and Sk respectively.
• P-uptake by Sudan grass and Sorghum with coating showed highest increase followed by broadcast than by soaking with averages of 150, 113 and 86% for Ct, Sk and Br respectively for 1st cut.
• P-Available in soil was 1.90 and 1.67 mg kg-1 under Sudan grass and Sorghum plants, respectively, whereas the broadcast technique was superior to the other techniques (soaking and coating).
Publication year 2013
Organization Name
Country Egypt
Publisher Name: قسم الأراضى ,كلية الزراعة بمشتهر ,جامعة بنها
Place: كلية الزراعة بمشتهر ,جامعة بنها
Author(s) from ARC
Agris Categories Soil chemistry and physicsSoil erosion, conservation and reclamation
AGROVOC
TERMS		 Chemicophysical properties. Clay soils. Irrigation scheduling. Nutrient uptake. Organic fertilizers.
Publication Type Master Thesis
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