Farahat,, M., EI-Mergawi, R. (2003). RESPONSE OF POTATO TO SOME GROWTH SUBSTANCES UNDER ORGANIC AND INORGANIC FERTILIZATION. Journal of Plant Production, 28(2), 931-946. doi: 10.21608/jpp.2003.242275
M. M. Farahat,; R. A. EI-Mergawi. "RESPONSE OF POTATO TO SOME GROWTH SUBSTANCES UNDER ORGANIC AND INORGANIC FERTILIZATION". Journal of Plant Production, 28, 2, 2003, 931-946. doi: 10.21608/jpp.2003.242275
Farahat,, M., EI-Mergawi, R. (2003). 'RESPONSE OF POTATO TO SOME GROWTH SUBSTANCES UNDER ORGANIC AND INORGANIC FERTILIZATION', Journal of Plant Production, 28(2), pp. 931-946. doi: 10.21608/jpp.2003.242275
Farahat,, M., EI-Mergawi, R. RESPONSE OF POTATO TO SOME GROWTH SUBSTANCES UNDER ORGANIC AND INORGANIC FERTILIZATION. Journal of Plant Production, 2003; 28(2): 931-946. doi: 10.21608/jpp.2003.242275
RESPONSE OF POTATO TO SOME GROWTH SUBSTANCES UNDER ORGANIC AND INORGANIC FERTILIZATION
Botany Dept., National Research Centre, Ookkl, Cairo, Egypt.
Abstract
Response of tuber yield and chemical composition of potato CV. Nicola 10 some growth substances GAJ ( 200 ppm), methionine (100 ppm) and Pix ( 300 ppm) under complementary fertilizer between farmyard manure (FYM) and inorganic was st.udied during the two growing seasons 2001 and 2002 in El-Salhia, Sharkia Governorate . The results indicated that spraying of Pix increased whereas GAJ decreased tuber yield I plant and feddan. The highesl values of specific gravity and dry matter COlo) resulted from GAJ and Pix respectively . Spraying GA3 gave the
highest N. P and K contents in the tuber, Application of the three growth substances increased Fe content especially Pix treatment.
Potato plants fertilized with 50% FYM + 50% NPK produced the highest number of tubers I plant , luber yield J plant, tuber yield J fed and tuber diameter as well as starch % while. the heaviest tuber weight resulted from 100% NPK. The highest value of N% resulted from application of 25% FYM + 75% NPK , P and Fe contents were increased by increasing FYM level. Opposite trend was observed with K content.
Conceming the interaction between growth substances and fertilizer. the results indicated that farmyard manure treatments were more effective on tuber yield I fed than the growth substances. The interaction between 50% FYM + 50% NPK arid Pix increased slgnificanUy tuber yield I plant, tuber yield I fed and tuber diameter as well as Fe content compared to control (100% NPK with spraying water ). The highest values of tuber weight and dry matter % were obtained with control. GAJ combined with 50"04, FYM + 500k NPK gave the highest specific gravity but, it gave the lowest dry matter % and T5S% . The combination of the growth substances with 50%
FYM + 50%. NPK increased starch % as compared with 100% NPK. 25% FYM + 75% NPK with spraying water recorded the highest free amino acids and proteins contents . GAl combined with fertilizer treatments had an effect on increasing Nand P % ,
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