Key Laboratory of Dryland Farming

Beijing, China

Key Laboratory of Dryland Farming

Beijing, China
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Hu Y.,Chinese Academy of Agricultural Sciences | Wang X.,Chinese Academy of Agricultural Sciences | Zhao Q.,Chinese Academy of Agricultural Sciences | Zheng Y.,Chinese Academy of Agricultural Sciences | And 6 more authors.
Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering | Year: 2010

In order to investigate the agronomic measures of irrigation by sea-ice water, amending the wasteland and alkaline arable land, the present study was for the purpose of investigating the effects of amelioration measures on soil salt dynamics and cotton yield under sea ice water irrigation. Four amelioration measures were inorganic fertilizer, inorganic + organic fertilizers, inorganic fertilizer + soil conditioner, and control (no fertilizer). The results showed that: (1) from 2007 to 2008, the soil salt in 1 m soil profile decreased with sea ice water irrigation. The soil desalting efficiency was about 40.2%. Na+ and Cl- in 0-40 soil layer were significantly decreased too; (2) the soil desalting efficiency in 1 m soil profile with sea ice water irrigation and PAM was 33820 kg/hm2 higher than that without PAM. The desalting efficiencies for Na+ and Cl- in the plow layers with PAM were also significant. (3) 2007-2008, cotton yield with different fertilization methods under irrigation with sea ice water were CK (no fertilizer)


Wang X.,Chinese Academy of Agricultural Sciences | Cai D.,Chinese Academy of Agricultural Sciences | Cai D.,Key Laboratory of Dryland Farming | Hoogmoed W.B.,Wageningen University | Oenema O.,Wageningen University
Journal of the Science of Food and Agriculture | Year: 2011

Background: An apparently large disparity still exists between developed and developing countries in historical trends of the amounts of nitrogen (N) fertilizers consumed, and the same situation holds true in China. The situation of either N overuse or underuse has become one of the major limiting factors in agricultural production and economic development in China. The issue of food security in N-poor regions has been given the greatest attention internationally. Balanced and appropriate use of N fertilizer for enriching soil fertility is an effective step in preventing soil degradation, ensuring food security, and further contributing to poverty alleviation and rural economic development in the N-poor regions. Results: Based on the China Statistical Yearbook (2007), there could be scope for improvement of N use efficiency (NUE) in N-rich regions by reducing N fertilizer input to an optimal level (≤180 kg N ha -1), and also potential for increasing yield in the N-poor regions by further increasing N fertilizer supply (up to 116 kg N ha -1). For the N-rich regions, the average estimated potential of N saving and NUE increase could be about 15% and 23%, respectively, while for the N-poor regions the average estimated potential for yield increase could be 21% on a regional scale, when N input is increased by 13%. Conclusion: The study suggests that to achieve the goals of regional yield improvement, it is necessary to readjust and optimize regional distribution of N fertilizer use between the N-poor and N-rich regions in China, in combination with other nutrient management practices. © 2011 Society of Chemical Industry.


Wu X.,Chinese Academy of Agricultural Sciences | Wu X.,Key Laboratory of Dryland Farming | Zheng Y.,Chinese Academy of Agricultural Sciences | Liu E.,Key Laboratory of Dryland Farming | And 10 more authors.
Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering | Year: 2010

In order to study the sea-ice water irrigation technology in the region near Bohai of China, the field micro-plot experiment was conducted to research soil moisture change and cotton yields using sea-ice water with different irrigation times and five salt concentrations (1, 3, 5L, 7 and 9 g/L) in 2008. The results showed that sea-ice water irrigation could improve soil moisture, especially during preplanting and seedling stage. The soil moisture content increased by about 22.85%-31.32% compared with CK (no irrigation) under the irrigation amount of 450 m3/hm2 each time could effectively relieve spring drought in cotton field. The cotton yields, boll number per plant and boll weight were the highest with sea-ice water of 1 g/L salt concentration (irrigated 3 times), which increased cotton yields by 38.63% compared with CK. The sea ice water of 3 g/L salt content (irrigated 2 times) increased yields by 29.8%. The cotton yields had decreasing trends with increased salt concentration of sea ice water used. The yields reduction rate with sea-ice water of 9 g/L salt concentration (irrigated 3 times) was 28.48% compared with CK (no irrigation). considering the desalinization technology, which and the long effects of salt concentrations of sea-ice water on soil and cotton yields, the results showed that sea-ice water of 3 g/L salt concentration could be used for cotton irrigation, in combination with drainage practices. In normal rain years, the sea-ice water could be irrigatted for cotton crops two times (before seedtime and at seedling stage) and irrigaton quantity was 450 m3/hm2 each time.


Wang X.,Chinese Academy of Agricultural Sciences | Zhao Q.,Chinese Academy of Agricultural Sciences | Hu Y.,Chinese Academy of Agricultural Sciences | Zheng Y.,Chinese Academy of Agricultural Sciences | And 6 more authors.
Irrigation Science | Year: 2012

The field experiment for cotton crop (Gossypium hirsutum L.) was conducted at the Zhongjie Farm, Huanghua city of Hebei province in the coastal salinity-affected areas in North China Plain, to determine the effects of an alternative of irrigation water sources/methods and agronomic practices on seedling emergence and yields of cotton, soil water-salt distributions, and soil pH changes during cotton growth stages. The experiment was setup using split-plot design with two water sources as main treatments (well water/desalinized sea-ice water); two irrigation methods (+PAM (Polyacrylamide)/-PAM); and four fertilization modes: check (CK), mineral fertilizer (F), mineral + organic fertilizer (FM), and mineral fertilizer + gypsum (FG). Using desalinized sea-ice water irrigation showed the same effects on top-soil salt leaching and desalinization as using well water did. There was no significant difference in seedling emergence and cotton yields between two irrigation water sources for cotton irrigation. Using PAM-treated irrigation, the 10-cm top-soil salinity significantly decreased to about 2.3-3.9 g kg -1 from 4.6 to 8.6 g kg -1 (PAM untreated). The PAM-treated irrigation increased seedling emergence by about 13, 29 and 36% and yields by about 50, 49, and 70%, with F, FM, and FG, respectively, as compared with CK. PAM-treated irrigation, either using well water or desalinized sea ice, especially in combination with gypsum-fertilization, shows the best practice for both seedling emergence and cotton yields. In conclusion, the desalinized sea-ice water used as an alternative water source, integrated with better agronomic practices of soil water-salt management could be acceptable for cotton irrigation in the coastal saline areas. © 2011 Springer-Verlag.

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