Journal of Food, Agriculture and Environment

Vol 11, Issue 1,2013
Online ISSN: 1459-0263
Print ISSN: 1459-0255

Effect of K on dry matter accumulation and distribution and changes of root-zone K in different cotton genotypes 


Cun-Cang Jiang *, Yan-Shu Hao, Xiao-Li Wang, Dian Wang, Jing Lei

Recieved Date: 2012-10-12, Accepted Date: 2013-01-24


Cotton (Gossypium hirsutum L.) is one of the most important economic crops in China as well as the world, potassium (K) plays a vital role in cotton growth and much attention has been paid on K efficiency recently. This trial was conducted to study the differences in dry matter accumulation, distribution, and root-zone K changes of K-efficient cotton genotype 103 and K-inefficient cotton genotype 122 through root box experiments. The results showed that genotype 103 could tolerate low K stress and grow much better than genotype 122. Number of bolls of genotype 103 was 3.3 times of that in genotype 122 at –K (0 g kg-1 soil), and 1.9 times of that at +K (0.30 g kg-1 soil). Boll dry matter weights of genotype 103 were much greater both in -K and +K treatments, compared with genotype 122. Soil slowly available K of genotype 103 in both rhizosphere and non- rhizosphere were lower at -K, but genotype 122 absorbed more K in soil with K application. The results demonstrate that K inefficient genotype 122 could not tolerate low K stress and only made lower yield increase with K fertilization, but K efficient genotype 103 could use less K fertilizer input and get higher yield, so it is feasible method to use high K efficiency genotype to reduce K fertilizer application and make better environmental benefits. 


Cotton (Gossypium hirsutum L.), genotype, dry matter, K efficiency, rhizosphere

Journal: Journal of Food, Agriculture and Environment
Year: 2013
Volume: 11
Issue: 1
Category: Agriculture
Pages: 604-608

Full text for Subscribers

Note to users

The requested document is freely available only to subscribers/registered users with an online subscription to the Journal of Food, Agriculture & Environment. If you have set up a personal subscription to this title please enter your user name and password. All abstracts are available for free.

Article purchasing

If you like to purchase this specific document such as article, review or this journal issue, contact us. Specify the title of the article or review, issue, number, volume and date of the publication. Software and compilation, Science & Technology, all rights reserved. Your use of this website details or service is governed by terms of use. Authors are invited to check from time to time news or information.

Purchase this Article:   20 Purchase PDF Order Reprints for 15

Share this article :