Energy partitioning and evapotranspiration over a rotated paddy field in Southern China

2019 ◽  
Vol 276-277 ◽  
pp. 107626 ◽  
Author(s):  
Bo Liu ◽  
Yuanlai Cui ◽  
Yufeng Luo ◽  
Yuanzhi Shi ◽  
Meng Liu ◽  
...  
Author(s):  
Haiming Tang ◽  
Chao Li ◽  
Lihong Shi ◽  
Li Wen ◽  
Kaikai Cheng ◽  
...  

Abstract Soil organic matter (SOM) and its fractions play an important role in maintaining or improving soil quality and soil fertility. Therefore, the effects of a 34-year long-term fertilizer regime on six functional SOM fractions under a double-cropping rice paddy field of southern China were studied in the current paper. The field experiment included four different fertilizer treatments: chemical fertilizer alone (MF), rice straw residue and chemical fertilizer (RF), 30% organic manure and 70% chemical fertilizer (OM) and without fertilizer input as control (CK). The results showed that coarse unprotected particulate organic matter (cPOM), biochemically, physically–biochemically and chemically protected silt-sized fractions (NH-dSilt, NH-μSilt and H-dSilt) were the main carbon (C) storage fractions under long-term fertilization conditions, accounting for 16.7–26.5, 31.1–35.6, 16.2–17.3 and 7.5–8.2% of the total soil organic carbon (SOC) content in paddy soil, respectively. Compared with control, OM treatment increased the SOC content in the cPOM, fine unprotected POM fraction, pure physically protected fraction and physico-chemically protected fractions by 58.9, 106.7, 117.6 and 28.3%, respectively. The largest proportion of SOC to total SOC in the different fractions was biochemically protected, followed by chemically and unprotected, and physically protected were the smallest. These results suggested that a physical protection mechanism plays an important role in stabilizing C of paddy soil. In summary, the results showed that higher functional SOM fractions and physical protection mechanism play an important role in SOM cycling in terms of C sequestration under the double-cropping rice paddy field.


2011 ◽  
Vol 26 (9) ◽  
pp. 1311-1320 ◽  
Author(s):  
Md. Shahadat Hossen ◽  
Masayoshi Mano ◽  
Akira Miyata ◽  
Md. Abdul Baten ◽  
Tetsuya Hiyama

2020 ◽  
Vol 112 (5) ◽  
pp. 3644-3652
Author(s):  
Haiming Tang ◽  
Yilan Xu ◽  
Chao Li ◽  
Xiaoping Xiao ◽  
Kaikai Cheng ◽  
...  

Author(s):  
Lena Kaufmann

This introduction introduces the basic predicament being faced by rice farmers in post-reform China: the conflicting pressures to both migrate into cities and yet preserve their family land resources in the countryside. It posits that paddy fields play a crucial role in shaping farmers’ migration strategies. More generally, it proposes that socio-technical resources and related skills are key factors in understanding migration flows and migrant-home relations. Furthermore, the chapter proposes a socio-technical approach to investigating this paddy field predicament and explains how this approach contributes to existing literature at the intersection of the literature on agriculture, migration, and skill. Finally, it introduces the main field site, a rice-farming village in southern China, and briefly discusses the data and sources.


2020 ◽  
Author(s):  
Haiming Tang ◽  
Xiaoping Xiao ◽  
Chao Li ◽  
Xiaochen Pan ◽  
Kaikai Cheng ◽  
...  

AbstractThe soil physicochemical properties were affected by different fertilizer managements, and the soil microbial communities were changed. Fertilizer regimes were closely relative to the soil texture and nutrient status in a double-cropping paddy field of southern China. However, there was limited information about the influence of different long-term fertilizer management practices on the soil microbial communities in a double-cropping rice (Oryza sativa L.) fields. Therefore, the 39-year long-term fertilizer regimes on soil bacterial and fungal diversity in a double-cropping paddy field of southern China were studied by using Illumina sequencing and quantitative PCR technology in the present paper. The filed experiment were including chemical fertilizer alone (MF), rice straw residue and chemical fertilizer (RF), 30% organic manure and 70% chemical fertilizer (OM), and without fertilizer input as a control (CK). The results showed that diversity indices of soil microbial communities with application of organic manure and rice straw residue treatments were higher than that without fertilizer input treatment. Application of organic manure and rice straw residue managements increase soil bacterial abundance of the phylum Proteobacteria, Actinobacteria, and Gammaproteobacteria, and soil fungi abundance of the phylum Basidiomycota, Zygomycota and Tremellales were also increased. Compared with CK treatment, the value of Richness, Shannon and McIntosh indices, and taxonomic diversity were increased with RF and OM treatments. This finding demonstrated that RF and OM treatments modify soil bacterial and fungal diversity. Therefore, the combined application of organic manure or rice straw residue with chemical fertilizer managements could significantly increase the abundance of profitable functional bacteria and fungi species in double-cropping rice fields of southern China.


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