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NEIGAE OpenIR  > 湿地与全球变化学科组  > 期刊论文
Title: Amounts of Stubbles Left in Paddy Fields: Evaluation from the Viewpoints of C Sequestration and Soil Fertility
Author: J. J. Liu, P. Zou, G. H. Wang, J. R. Fu, H. Ando and M. Kimura
Corresponding Author: 王光华
Source: Philippine Agricultural Scientist
Issued Date: 2017
Volume: 100, Issue:1, Pages:88-95
Abstract: Plant residues are the main source of organic materials maintaining soil fertility in paddy fields, among which rice stubble has been disregarded of its importance so far. This study highlighted the great amount of rice stubbles retained in paddy fields in comparison with that of corn stubbles. Height of rice stubbles was measured in paddy fields under harvesting methods by hand and harvesters around Harbin and Shaoxing City, China. The height of stubbles above the ground was 5.0 +/- 1.7 cm, 10.1 +/- 2.3 cm and 28.7 +/- 8.4 cm for rice fields harvested by hand and harvesters that left rice straw in the fields without and with cutting it into segments, corresponding to 18-25%, 25-32% and 47-60% of total top part biomass (excluding ears), respectively. These results suggested that the biomass of stubbles left in paddy fields by the second-type harvesters was larger than that of rice straw. Mechanization in harvesting rice plants was 73% in 2014, and the estimated amount of stubbles left in paddy fields was at least 1514 to 1973 kg ha(-1). Comparable measurements of corn plants and stubbles in corn fields showed that the average height of corn stubbles harvested by hand was 9.1 +/- 2.5 cm and the corresponding stubble biomass was only about 7-9% of the total top-part biomass (excluding ears) amounting to 413-639 kg ha(-1). This was the first study that quantitatively elucidated the importance of rice stubbles in C sequestration and soil fertility in paddy fields in recent China.
Content Type: 期刊论文
URI: http://ir.iga.ac.cn/handle/131322/7609
Appears in Collections:湿地与全球变化学科组_期刊论文

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