全 文 ： ACTA AGRONOMICA SINICA 2008, 34(8): 1393−1402 http://www.chinacrops.org/zwxb/
ISSN 0496-3490; CODEN TSHPA9 E-mail: xbzw@chinajournal.net.cn

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   (2003-05-02B);  ( )  (nyhyzx07-005); 
(30571095);  (BK2005091, BK2006141)
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!#(1982–), $, %&(), *+ ,, -./01,2,34Tel: 025-84396856; E-mail: 2005101066@njau.edu.cn
*
5607(Corresponding authors):

89:, ;<4Tel: 025-84396813; E-mail: giscott@njau.edu.cn
Received(=>?@): 2007-11-02; Accepted(AB?@): 2008-03-14.
DOI: 10.3724/SP.J.1006.2008.01393
  
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Spatial and Temporal Variability of Available Nutrient in Cotton Field at
Flower and Boll Stage and Its Effect on Lint Yield and Fiber Quality
YANG Zhi-Bin, CHEN Bing-Lin*, and ZHOU Zhi-Guo*
(Key Laboratory of Crop Growth Regulation, Ministry of Agriculture, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China)
Abstract: Flower and boll stage is a key period for lint yield and fiber quality. Studying the spatial and temporal variability of
available nutrient in cotton field at flower and boll stage can provide theoretical base for exploring the physiological measure-
ments to improve lint yield and fiber quality. The field experiments were carried out in 2004 at application levels of 0, 120, 240,
360, and 480 kg N ha−1(marked N0, N1, N2, N3, N4 respectively), 185 kg P ha−1 and 118 kg K ha−1 in Anyang and Nanjing, the
typical representatives for ecological regions in Yellow River Valley and the middle lower reaches of Yangtze River Valley in
China. The results indicated that, in the process of growth, the content of soil alkali-hydrolyzable nitrogen in 0–60 cm soil layers
of N0 treatment presented the trend of decreasing firstly and increasing then. While that of other treatments decreased firstly, in-
creased after topdressing, decreased again, and increased after the beginning of boll opening. Soil available phosphorus and
available potassium in 0–60 cm soil layers at two experimental locations presented the similar trends of decreasing firstly and
increasing then. Soil available nutrient in 0–60 cm soil layers decreased with the deepening of the layer. Soil alkali-hydrolyzable
nitrogen and available phosphorus in the same soil layer of N1, N2, N3, and N4 treatments in Nanjing presented the similar de-
creasing as the horizontal distance to cotton plant increased, and in N0 treatment, there was no significant variation in al-
kali-hydrolyzable nitrogen and available phosphorus contents. The spatial and temporal variability for soil alkali-hydrolyzable
nitrogen was more significant in Nanjing than in Anyang. While for soil available phosphorus, it was more significant in Anyang
than in Nanjing. Soil available potassium in 0–60 cm soil layers in Nanjing and in 20–60 cm soil layers in Anyang presented the
1394      34

similar decreasing with the increasing of horizontal distance to cotton plant, while that in 0–20 cm soil layers in Anyang increas-
ing. As a result, at the nitrogen application level of 360 kg ha−1 for Anyang and 240 kg ha−1 for Nanjing, yield components were
the relatively optimal, yield was the maximum and the fiber quality of length and strength was better. So, in order to increase lint
yield and fiber quality, different ecological regions should follow the spatial and temporal variability of soil available nutrient in
cotton field at flower and boll stage to confirm the optimal fertilizer level.
Keywords: Flower and boll stage; Available nutrient; Spatial and temporal variability; Lint yield; Fiber quality
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Fig. 3 Spatial and temporal variability of soil available potassium content in cotton field (Anyang, Henan; Nanjing, Jiangsu)
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1400  !  34

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Table 1 Effect of spatial and temporal variability of soil available nutrient in cotton field on lint yield and yield components

Experimental
location

Treatment

Bolls per plant

Boll weight
(g)

Lint percentage
(%)
 !
Lint yield
(kg hm−2)
N0 17.06 cB 4.87 a 37.93 a 1679.02 b
N1 18.33 abAB 4.80 a 37.07 a 1740.56 ab
N2 17.94 bAB 4.88 a 37.86 a 1769.04 ab
N3 18.72 aAB 4.79 a 37.42 a 1789.48 a
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Anyang, Henan
N4 18.83 aA 4.61 a 37.76 a 1750.13 ab

N0 15.73 cB 4.39 a 35.17 a 1106.89 dC
N1 18.80 aAB 4.76 a 35.57 a 1406.86 abAB
N2 19.20 aAB 4.60 a 35.63 a 1467.09 aA
N3 19.50 aA 4.54 a 34.30 a 1369.14 bAB
($)
Nanjing, Jiangsu
N4 17.05 bB 4.56 a 33.70 a 1262.90 cB
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Table 2 Effect of spatial and temporal variability of soil available nutrient in cotton field on cotton fiber qualities

Experimental
location

Treatment
78
Fiber length
(mm)
9:8
Uniformity
(%)
;<8
Strength
(cN tex−1)
=7>
Elongation rate
(%)
?@AB
Micronaire
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N1 29.47 a 83.23 a 27.13 ab 7.13 a 4.60 bcAB
N2 29.57 a 83.80 a 27.27 ab 6.93 a 4.93 aA
N3 30.27 a 84.17 a 28.17 a 7.30 a 4.53 bcAB
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Anyang, Henan
N4 30.17 a 83.47 a 27.27 ab 7.13 a 4.73 bAB

N0 30.21 a 84.57 a 29.93 b 6.80 a 5.60 a
N1 30.57 a 84.27 a 31.07 ab 6.73 a 5.37 a
N2 31.12 a 84.27 a 31.63 a 6.87 a 5.60 a
N3 30.57 a 84.30 a 30.73 ab 6.60 a 5.57 a
($)
Nanjing, Jiangsu
N4 29.82 a 84.77 a 30.47 ab 6.83 a 5.47 a
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