Increased root length and branching in cotton by soil application of the plant growth regulator PGR-IV |
| |
Authors: | D. M. Oosterhuis D. Zhao |
| |
Affiliation: | (1) Department of Agronomy, University of Arkansas, 72703 Fayetteville, AR, USA |
| |
Abstract: | Field and growth chamber studies were used to determine the effect of in-furrow application of PGR-IV on root and shoot development, and yield of cotton. In the field study, an in-furrow application of PGR-IV @ 73 mL ha–1 at planting increased yield by 18% compared to the untreated control, and by 11% compared to 2-foliar applications of 292 mL/ha–1 each at pinhead square stage of flower development and at first flower appearance. Growth chamber studies revealed that the in-furrow applications of PGR-IV @ 1.131 L/plant dramatically increased root length (+47%), root dry weight (+29%), number of lateral roots per plant (+75%), and nutrient uptake one week after planting. These differences were still apparent five weeks later at pinhead square but to a lesser degree. The yield enhancement from the foliar applications was associated with increases in leaf growth, nutrient uptake, and boll number, whereas the yield enhancement from the soil application was associated with enhanced root growth and nutrient uptake. The positive effect of PGR-IV on root growth and accelerated early-season growth could have very substantial benefits in cotton production. |
| |
Keywords: | Cotton gibberellic acid indolebutyric acid Gossypium hirsutum L. nutrient uptake plant growth regulator roots root length |
本文献已被 SpringerLink 等数据库收录! |
|