Response of soybean to phsophogypsum and superphosphate applicationunder the Egyption soils condations [electronic resource].

By: Language: English Summary language: Arabic Description: p.4337-4348Other title:
  • استجابة فول الصويا لاضافة الفوسفوجيبسم و السوبر فوسفات تحت ظروف الاراضي المصرية [Added title page title]
Uniform titles:
  • Mansoura University journal of agricultural sciences, 2004 v. 29 (7) [electronic resource].
Subject(s): Online resources: In: Mansoura Unviersity Journal of Agricultural Sciences 2004.v.29(7)Summary: Two field experiments were carried out at Sakha Agriculture Research Station Farm during 2002 and 2003 summer seasons using soybean (Glycine max) variety Giza 111 to investigate the effect of phosphogypsum (PG) as a source of posphorus and some nutrients, superphosphate (P) and potassium (K) on soybean yields, nutrient status in soil and plants. Split plot design was used in four replicates. The main plots were assigned by four treatments of 1- without PG and P (check treatment), 2-application of 2 ton PG/fed., 3- application of 15 kg P2O5 fed-1 as superphosphate 15% (P), and 4- application of PG + P (2 ton PG+ 15 kg P20slfed.). The subplots were assigned by three potassium (K) levels of 1- without potassium (Ko), 2- application of 24 kg K2O fed-1 (K,) as potassium sulphate 48%, and 3¬ application of 48 K2O fed-1 (K 2). The results can be summarized as follow: Phosphogypsum application led to increase soybean seeds and straw yields: while PG + P gave the highest oil yield kg fed-1. . Potassium application at the rate of 48 kg K2O fed-1 observed a decrease in oil yield kg fed-1 Addition of PG + P led to 38.77% increase in protein yield kg fed-1 in the first season. In the second season addition of P alone led to 22.51 % increase in protein yield kg fed-1. PG caused a detected increase in soybean nodules number and nodules dry weight comparing with the other treatments. PG application slightly decreased soil pH. On the other hand a slight increase in soil EC due to PG application was obtained. PG application increased the residual available N, P and K in the soil.
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Two field experiments were carried out at Sakha Agriculture Research Station Farm during 2002 and 2003 summer seasons using soybean (Glycine max) variety Giza 111 to investigate the effect of phosphogypsum (PG) as a source of posphorus and some nutrients, superphosphate (P) and potassium (K) on soybean yields, nutrient status in soil and plants. Split plot design was used in four replicates. The main plots were assigned by four treatments of 1- without PG and P (check treatment), 2-application of 2 ton PG/fed., 3- application of 15 kg P2O5 fed-1 as superphosphate 15% (P), and 4- application of PG + P (2 ton PG+ 15 kg P20slfed.). The subplots were assigned by three potassium (K) levels of 1- without potassium (Ko), 2- application of 24 kg K2O fed-1 (K,) as potassium sulphate 48%, and 3¬ application of 48 K2O fed-1 (K 2). The results can be summarized as follow: Phosphogypsum application led to increase soybean seeds and straw yields: while PG + P gave the highest oil yield kg fed-1. . Potassium application at the rate of 48 kg K2O fed-1 observed a decrease in oil yield kg fed-1 Addition of PG + P led to 38.77% increase in protein yield kg fed-1 in the first season. In the second season addition of P alone led to 22.51 % increase in protein yield kg fed-1. PG caused a detected increase in soybean nodules number and nodules dry weight comparing with the other treatments. PG application slightly decreased soil pH. On the other hand a slight increase in soil EC due to PG application was obtained. PG application increased the residual available N, P and K in the soil.

Summary in Arabic.

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