Rational utilization of Chinese milk vetch improves soil fertility, rice production, and fertilizer use efficiency in double-rice cropping system in East China

Modelling methane emissions and grain yields for a double-rice system in Southern China with DAYCENT and DNDC models

“… Cheng et al (2013) developed and evaluated the DAYCENT CH 4 module using total 97 rice paddy sites across China, with an overall r of 0.83 for model predictions vs measurements. In addition, the DNDC model has been corroborated by many CH 4 emission datasets from Chinese rice fields, and the simulated values are generally in good agreement with the observed CH 4 field emissions ( Zhang et al, 2002 , Li et al, 2006 , Zhang et al, 2019 , Zhao et al, 2020 , Wang et al, 2021a , Wang et al, 2021b ).…”

“…The sensitivity of DAYCENT and DNDC and the attribution of CH 4 and early-/late-rice grain yields to different input parameters were investigated to quantify the effects of these parameters on the CH 4 emissions and grain yields ( Smith and Smith, 2007 , Cheng et al, 2013 , Wang et al, 2021a , Wang et al, 2021b ). The baseline scenario was composed based on the treatment S. Only one parameter was changed at a time and all the other kept constant.…”

“…Simulation models allow complex interactions and real-world problems to be examined in a cost- and time-effective way ( Giltrap et al, 2010 , Cheng et al, 2013 ). DAYCENT and DeNitrification-DeComposition (DNDC) are two popular ecological process-based models to simulate methane (CH 4 ) emissions from rice paddy fields in China ( Li et al, 2006 , Cheng et al, 2014 , Zhang et al, 2019 , Wang et al, 2021a , Wang et al, 2021b ). Cheng et al (2013) developed and evaluated the DAYCENT CH 4 module using total 97 rice paddy sites across China, with an overall r of 0.83 for model predictions vs measurements.…”

“…Considerable research has been conducted on improving field management in the double-rice cropping system to mitigate CH 4 emissions while maintaining optimal rice yields. These have mainly focused on the fertilization rate and method (Tang et al, 2020; Fu et al, 2021; Wang et al, 2021a , Wang et al, 2021b ), irrigation management method ( Li et al, 2020 ; Zeng and Li, 2020), and tillage management ( Chen et al, 2021 , Wang et al, 2021a , Wang et al, 2021b ).…”

Green manure rotation and application increase rice yield and soil carbon in the Yangtze River valley of China

“…In the present study, it was revealed that the optimum green manure application rate to optimize yield was ~23 t ha -1 , and to sequester soil C was ~25 t ha -1 . Similarly, Wang et al (2021) showed that green manure additions of 15--23 t ha -1 had beneficial effects on the stability of paddy rice yield as well as the fertilizer efficiency for double rice cropping system in East China. However, both yield and soil C sequestration response curves tended to flatten for higher green manure application rates, and above a certain point yield and soil C sequestration even decreased with a further green manure amendment (Figs.…”