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| 1 | A Preliminary Study on Dynamics and Models of N,P,K Absorption for High-Yield Cotton显示文摘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. | WANGKe-ru LIShao-kun CAOLian-pu SONGGuang-jie CHENGang CAOSuan-zhu | 2003 | Agricultural Sciences in China2003，2，7： | 6 |
| 2 | 狭叶香蒲及其开发利用研究进展显示文摘狭叶香蒲作为一种重要的经济植物,有着广泛的用途。介绍了狭叶香蒲的特征生态学、药用价值、环保价值、经济价值,以期促进狭叶香蒲的进一步开发利用。 | 袁宜如 李晓云 高光林 | 2012 | 现代农业科技2012，，9： | 4 |
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