Nitrogen dynamics, apparent mineralization and balance calculations in a maize – wheat double cropping system of the North China Plain

2014 ◽  
Vol 160 ◽  
pp. 22-30 ◽  
Author(s):  
Tobias Edward Hartmann ◽  
Shanchao Yue ◽  
Rudolf Schulz ◽  
Xinping Chen ◽  
Fusuo Zhang ◽  
...  
2003 ◽  
Vol 83 (2) ◽  
pp. 111-124 ◽  
Author(s):  
Xuejun Liu ◽  
Xiaotang Ju ◽  
Fusuo Zhang ◽  
Jiarong Pan ◽  
Peter Christie

2019 ◽  
Vol 58 (12) ◽  
pp. 2605-2615
Author(s):  
Qi Hu ◽  
Xueqing Ma ◽  
Xuebiao Pan ◽  
Huang Binxiang

AbstractClimate warming in the North China Plain (NCP) is expected to greatly affect corn production. On the basis of a comprehensive consideration of the double-cropping system, we investigated the impacts of climate warming in the past 55 years on the planting boundaries and areas of varieties of summer corn with different maturity levels. In addition, we tried to explore the probable reasons for the changes in planting boundaries. Climate warming caused a northward shift in the planting boundaries of summer corn, resulting in the expansion of the total planting area. However, the trend for the planting area of each belt of corn maturity was not always consistent. Because of the advanced planting date and delayed physiological maturation date, the growing season of corn in the NCP has been prolonged in the past 55 years. Climate warming also increased the active accumulated temperature with a threshold of 10° (AAT10) during the corn growing season by 73.2°C decade−1, which was mainly caused by the increase in the number of days with a daily temperature over 10°C. In summary, the planting boundaries of varieties of summer corn with different maturity levels have greatly changed due to climate change, and corn production in the NCP could benefit from climate warming through the greater planting area and longer growing season.


2007 ◽  
Vol 49 (10) ◽  
pp. 1517-1526 ◽  
Author(s):  
Quanxiao Fang ◽  
Yuhai Chen ◽  
Qiang Yu ◽  
Zhu Ouyang ◽  
Quanqi Li ◽  
...  

Soil Research ◽  
2009 ◽  
Vol 47 (6) ◽  
pp. 585 ◽  
Author(s):  
Zhangliu Du ◽  
Shufu Liu ◽  
Kejiang Li ◽  
Tusheng Ren

The influences of long-term residue and fertiliser management on soil organic carbon (SOC) and related physical properties were investigated in a wheat (Triticum aestivum L.)–corn (Zea mays L.) double-cropping system in the North China Plain. The experiment was initiated in 1981, including 4 treatments: control (no fertiliser); mineral N and P fertilisers; low residue rate plus N and P fertilisers; and high residue rate plus N and P fertilisers. In June 2006, soil samples were taken from the 0–0.05, 0.05–0.10, and 0.10–0.20 m layers to determinate bulk density (ρb), water-stable aggregates, bulk SOC, and aggregate-associated C concentrations. Soil water retention curves and saturated hydraulic conductivity (Ks) were measured using samples collected from the 0–0.05 and 0.05–0.10 m layers. The results indicated that residue incorporation significantly increased (i.e. improved) bulk SOC and aggregate-associated C concentration, aggregation, Ks, soil matrix and structural porosities, and water retention capacity. The improvements in soil physical properties by mineral N and P fertilisers alone were limited. Residue input significantly (P < 0.05) increased the value of S, an index of soil physical quality. A high correlation existed between S and SOC concentration, and the key soil physical parameters, suggesting that S was an effective parameter for evaluation of soil physical quality. Our study concluded that a combination of residue with mineral N and P fertilisers improved SOC concentration, and consequent soil physical quality under the wheat–corn double cropping system.


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