首页|期刊导航|中国农业科学(英文版)|A Preliminary Study on Dynamics and Models of N, P, K Absorption for High-Yield Cotton
中国农业科学(英文版)2003，Vol.2Issue(7)：752-759,8.
A Preliminary Study on Dynamics and Models of N, P, K Absorption for High-Yield Cotton
A Preliminary Study on Dynamics and Models of N, P, K Absorption for High-Yield Cotton
摘要
Abstract
The field experiments were carried out to investigate the dynamics and models of N, P and K ab-sorption for the cotton plants with a lint of 3 000 kg ha-1 in Xinjiang. The main results were as follows: Thecontents of N, P2O5, K2O in cotton leaves, stems, squares and bolls decreased obviously with the time over thewhole growth duration and the falling extent was greater in high-yield cotton than in CK. Contents of N inleaves, squares and bolls, in particular in the leaves of fruit-bearing shoot was higher in high-yield cotton thanin CK. Contents of P2O5 in squares and bolls and that of K2O in stems were higher in high-yield cotton than inCK during the whole growing period. The accumulations of N, P2O5 and K2O in the cotton plants could be de-scribed with a logistic curve equation. There was the fastest nutrient uptake at about 90 d for N, 92 d for P2O5and 85 d for K2O after emergence, respectively. Total nutrient accumulation of N, P2 O5 and K2O was 385.8,244.7 and 340.3 kg ha-1 , respectively. Approximately 12.5 kg N, 8.0 kg P2O5 and 11.1 kg K2O were neededfor producing 100 kg lint with the leaves and stems under the super high yield condition of 3 000 kg ha-1 inXinjiang.关键词
Xinjiang/Cultivation of high yield/Cotton/N/P/K/Absorption dynamics/ModelKey words
Xinjiang/Cultivation of high yield/Cotton/N/P/K/Absorption dynamics/Model引用本文复制引用
WANG Ke-ru,LI Shao-kun,CAO Lian-pu,SONG Guang-jie,CHEN Gang,CAO Suan-zhu..A Preliminary Study on Dynamics and Models of N, P, K Absorption for High-Yield Cotton[J].中国农业科学(英文版),2003,2(7):752-759,8.基金项目
This work was supported by the National Key Technologies R&D Program in 10th Five-year Plan of China(2001BA507A) and the National Natural Sicence Foundation of China(39760040). （2001BA507A）
