Effects of different tillage management on rhizosphere soil nitrogen mineralization and its extracellular enzyme activity in a double‐cropping rice paddy field of southern China

2021 ◽  
Author(s):  
Haiming Tang ◽  
Chao Li ◽  
Kaikai Cheng ◽  
Lihong Shi ◽  
Li Wen ◽  
...  
Keyword(s):  
Enzyme Activity ◽  
Nitrogen Mineralization ◽  
Soil Nitrogen ◽  
Rhizosphere Soil ◽  
Southern China ◽  
Extracellular Enzyme ◽  
Rice Paddy ◽  
Rice Paddy Field ◽  
Soil Nitrogen Mineralization ◽  
Double Cropping

Functional soil organic matter fractions in response to long-term fertilizer management in a double-cropping paddy field of southern China

2021 ◽  
pp. 1-9
Author(s):  
Haiming Tang ◽  
Chao Li ◽  
Lihong Shi ◽  
Li Wen ◽  
Kaikai Cheng ◽  
...  
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Paddy Field ◽  
Southern China ◽  
Rice Paddy ◽  
Chemical Fertilizer ◽  
Protection Mechanism ◽  
Rice Paddy Field ◽  
Double Cropping

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.

Elevated CO2 improved soil nitrogen mineralization capacity of rice paddy

2020 ◽  
Vol 710 ◽  
pp. 136438 ◽  
Author(s):  
Qicong Wu ◽  
Congzhi Zhang ◽  
Xuequan Liang ◽  
Chunwu Zhu ◽  
Tingyun Wang ◽  
...  
Keyword(s):  
Elevated Co2 ◽  
Nitrogen Mineralization ◽  
Soil Nitrogen ◽  
Rice Paddy ◽  
Soil Nitrogen Mineralization

Ant-mediated effects on soil nitrogen mineralization vary with species in a tropical forest

CATENA ◽  
2021 ◽  
Vol 203 ◽  
pp. 105352
Author(s):  
Qianqian Zuo ◽  
Shaojun Wang ◽  
Ping Wang ◽  
Qianbin Cao ◽  
Shuang Zhao ◽  
...  
Keyword(s):  
Tropical Forest ◽  
Nitrogen Mineralization ◽  
Soil Nitrogen ◽  
Soil Nitrogen Mineralization ◽  
Mediated Effects
Sign in / Sign up

Export Citation Format

Share Document