Introduction to Double Rice Cropping

We carried out a year-round field experiment to measure methane (CH4) and nitrous oxide (N2O) fluxes, crop yield and NAE under different fertilization regimes in a subtropical double-rice cropping system.

In order to identify if it can replace chemical P fertilizer, a 35-year field trail in a paddy soil under double-rice cropping system was conducted to assess the effects of substituting chemical P fertilizer with pig manure (NKM) on rice yield, phosphorus use efficiency (PUE) and P balance.

Taken together, our findings demonstrate that substituting NF with an appropriate amount of NFC is beneficial for improving the productivity and sustainability of paddy fields under the double-rice cropping system.

In this study, in a typical double-rice cropping system, N and P runoff losses and soil carbon (C), N, and P contents (soil CNP contents) were observed under three different biochar application rates (0, 24, and 48 t ha-1, which were defined as CK, LB, and HB, respectively) from 2017 to 2019.

We accordingly conducted a two-year field experiment to investigate the influence of RNHD on rice yield, fertilizer 15N fate, and root growth in a double-rice cropping system in China.

Double-rice cropping (DRC) in southern China has made outstanding contributions to ensuring food security, along with a large amount of greenhouse gas (GHG) emissions.

The findings of our study contribute to the understanding of dynamic changes in physical, chemical and biological properties of soil across different crop stages due to intensified green bean planting during the winter fallow period in a double-rice cropping system, which will be useful for the sustainable development of RRV.

Accordingly, a 3-year field experiment was conducted to simultaneously measure methane (CH4) and nitrous oxide (N2O) emissions and changes in soil organic carbon (SOC) under conventional tillage (CT), reduced tillage (RT) and no-tillage (NT) methods in Chinese double-rice cropping systems.

The incorporation of straw and application of straw-derived biochar to croplands may help to achieve these goals; however, the long-term effects on soil C sequestration and NUE in double-rice cropping systems are poorly understood.

Overall, application of UNI was the superior alternative to prilled urea in the double rice cropping system because of consistently higher yield and profitability, while maintaining soil fertility at similar levels to the other N fertilizer options.

Four-year liming experiments were conducted to assess the remediation of Cd-contaminated acidic paddy fields in a double rice cropping system.

Overall, winter crop-double rice cropping system could improve soil nutrient contents and N production efficiency, alleviate K deficiency, which would be beneficial to soil nutrient balance of paddy soils.

At present, limited information is available to understand how plant N uptake and N use efficiency respond to elevated [CO2] and/or temperature in Chinese double rice cropping systems.

These farming systems can generate higher income than mono-cropping or double rice cropping.

Little is known about the effect of elevated temperature and its interaction with elevated [CO2] in the Chinese double rice cropping system.

Then, a three-year pot experiment (from 2012 to 2014) with double rice cropping was conducted with two different fertilization regimes (no fertilization, F0; fertilization, F1) using CK, NPK and NPKM soils.

Nevertheless, its effect on the growth, yield and N use efficiency(NUE) of rice in double rice cropping system under subtropical environment are still unknown.

In this study, we examined the effects of biochar on CH4 emissions, soil properties, and abundance/community composition of methanogens and methanotrophs in a double rice cropping system from 2012 to 2016.

A long-term field experiment was carried out (since 2008) for evaluating the effects of different substitution rates of inorganic nitrogen (N) fertilizer by green manure (GM) on yield stability and N balance under double rice cropping system.

Therefore, a field experiment was carried out in a double rice cropping system with three wheat straw biochar treatments:no biochar treatment (CK), added 24 t·hm-2 biochar (LC), and added 48 t·hm-2 biochar (HC).

In the present study, we examined for the first time the response of fertilizer N use efficiency to experimental warming using 15N labeling with a free-air temperature increase facility (infrared heaters) in a double rice cropping system.

However, limited information exists about the effect of improved agronomic practices on the N surplus in double rice cropping system.

To evaluate the actual response of rice starch physicochemical properties to climate warming, a field warming experiment was conducted with four indica rice cultivars using free-air temperature increase (FATI) facility in a double rice cropping system.

A 2-year field study was conducted in a double rice cropping system in southern China to examine the effect of fertilization on CH4, N2O and CO2 fluxes using static opaque chambers and gas chromatographs.

The highest losses of TN and TP were the South China double rice cropping area.

The Senegal River is shared by Senegal, Mali, Mauritania, and Guinea, and serves as the main source of irrigation water for the adopted double rice cropping system.

This study aimed to explore the responses of soil P-fractions and their mobility to different long-term chemical fertilization rates under a double rice cropping system.