EFFECT OF MINERAL AND BIO-FERTILIZERS ON THE PRODUCTIVITY AND FIBER QUALITY OF GIZA 80 COTTON VARIETY

Document Type : Research articles.

Authors

1 Agronomy Department, Faculty of Agric., Cairo Univ., Egypt.

2 Cotton Res. Inst. Agric. Center, Minst. Agric., Giza, Egypt.

Abstract

This study was carried out at Sids Agricultural Research Station,
Beni-Suef Governorate, during 2006 and 2007 seasons. The work was
designed to study the effect of different rates of mineral NPK fertilizers
(60N, 22.5 P
2O5 and 24 K2O kg/fed., respectively), three biofertilizers
(Rhizobacterien, phosphorien and potassyomage) and their interactions
on some growth characters, yield and its components and some fiber
properties of Giza 80 cotton cultivar.
The obtained results could be summarized as follows:-
* Use of mineral and biofertilizer had a significant effect on all growth
and yield characters in both seasons except seed index in second
season and fiber properties except micronair reading in both seasons.
* Usa of mineral fertilizers alone recorded the highest average of plant
height, boll weight (first season), No. of sympodial branches/plant
and seed cotton yield/fed., in the two seasons.
* Use of 75% mineral fertilizers with Rhizobacterin, phosphorien and
potassyomage recorded the best averages of position of first
sympodial node and seed cotton yield/fed. While, use 50% mineral
fertilizer with all biofertilizer gave the highest values of No. of open
bolls/plant, boll weight (second season) and seed cotton yield /plant.
* Use of 75% mineral (P) plus phosphorien led to increase boll weight
(second season) and seed index.
* Use of biofertilizers alone significantly decreased all characters under
study in both seasons.


Keywords