Aboveground morphological traits do not predict rice variety effects on CH4 emissions

Zhang, Yi; Li, Zhijie; Zhu, Xiangzhen; Wang, Xiaofei; Chen, Jin; Hang, Xiaoning; Deng, Aixing; Zhang, Jun; Zhang, Weijian

doi:10.1016/j.agee.2015.04.030

Cited by 28 publications

(14 citation statements)

References 35 publications

(31 reference statements)

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“…The climatic conditions, soil properties, and rice varieties are shown in Table S1 (see Supplementary Table S1 ). Ten and nine varieties released in different eras beginning in 1950 were randomly selected from the RW and DR regions, respectively 49 . Both of these rice varieties are commercial varieties and are commonly planted at over 1,000,000 ha each.…”

Section: Methodsmentioning

confidence: 99%

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Optimizing rice plant photosynthate allocation reduces N2O emissions from paddy fields

Huang

Zhang

et al. 2016

Sci Rep

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Rice paddies are a major source of anthropogenic nitrous oxide (N2O) emissions, especially under alternate wetting-drying irrigation and high N input. Increasing photosynthate allocation to the grain in rice (Oryza sativa L.) has been identified as an effective strategy of genetic and agronomic innovation for yield enhancement; however, its impacts on N2O emissions are still unknown. We conducted three independent but complementary experiments (variety, mutant study, and spikelet clipping) to examine the impacts of rice plant photosynthate allocation on paddy N2O emissions. The three experiments showed that N2O fluxes were significantly and negatively correlated with the ratio of grain yield to total aboveground biomass, known as the harvest index (HI) in agronomy (P < 0.01). Biomass accumulation and N uptake after anthesis were significantly and positively correlated with HI (P < 0.05). Reducing photosynthate allocation to the grain by spikelet clipping significantly increased white root biomass and soil dissolved organic C and reduced plant N uptake, resulting in high soil denitrification potential (P < 0.05). Our findings demonstrate that optimizing photosynthate allocation to the grain can reduce paddy N2O emissions through decreasing belowground C input and increasing plant N uptake, suggesting the potential for genetic and agronomic efforts to produce more rice with less N2O emissions.

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Section: Methodsmentioning

confidence: 99%

“…Nitrous oxide fluxes were measured using the static closed chamber technique 29 49 . For N 2 O flux measurement in the pot experiment, pots were transferred to a large container with 2 cm water, and a PVC chamber (height, 130 cm; diameter, 30 cm) was placed on the top of each pot.…”

Section: Methodsmentioning

confidence: 99%

Optimizing rice plant photosynthate allocation reduces N2O emissions from paddy fields

Huang

Zhang

et al. 2016

Sci Rep

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“…The experiments were carried out in 2011 at three locations, respectively, in three major Chinese rice cropping regions (figure S1), including (1) Shenyang, Liaoning Province with SR system, (2) Danyang, Jiangsu Province with RU system, and (3) Jinxian, Jiangxi province with DR system. Ten local major varieties, released in different eras between 1960s and 2000s, were selected for each location according to the results of expert survey and the statistical data of rice varieties in China (supplementary table S3; Zhang et al 2015). The experiment consisted of a complete randomized block design with three replicates at each site.…”

Section: Field Experiments 1: Variety Impactsmentioning

confidence: 99%

Contribution of rice variety renewal and agronomic innovations to yield improvement and greenhouse gas mitigation in China

Zhang

Jiang

Tai

et al. 2019

Environ. Res. Lett.

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China's rice agriculture, a primary source of greenhouse gases (GHGs), has experienced great changes in the last five decades due to changes in dominant varieties and farming practices. However, the impacts of these changes on GHG emissions have not been comprehensively assessed. While most earlier studies focused on the GHG emissions per unit area, recent research indicated that the yield-scaled impact may better reflect the reality. Through integrating the results from a meta-analysis, two multi-site field experiments and an expert survey, we quantify the integrated impacts of different practices on both area-and yield-scaled GHG emissions in China. Results from the expert survey showed that rice planting area has shifted northwards, and alternate water-saving (WS) irrigation has been applied in nearly 78% of Chinese rice paddy areas in both the rice nursery stage and post-transplanting period over the past five decades. The changes of these practices and replacement of new rice varieties have increased China's rice yield by 131%. During the same period, cropping system adjustment, variety replacement, and implementation of WS irrigation have reduced total GHG emissions by 7%, 31%, and 42%, respectively. Also, the major decrease in GWP occurred prior to the 2000s, and the decreasing trend continued in the post-2000s period but at a slower rate. Our results have some limitations as these estimates ignore a number of important variations and interactions among management factors as well as climatic and edaphic conditions. Still, our findings illustrate that it is possible to enhance rice productivity at reduced environmental costs through screening for low emission varieties and agronomic practices. Future innovations should ensure that rice farming progressively adapts to climate change, while continuing to reduce GHG emissions.

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“…Sifat morfologi tanaman seperti jumlah anakan merupakan salah satu faktor yang berhubungan langsung dengan besar kecilnya CH 4 , karena berperan dalam proses transportasi CH 4 (Zhang et al, 2015). Jumlah anakan maksimum terjadi saat tanaman berumur 38 HST dimana jumlahnya meningkat sebesar 45%, 36%, dan 27% secara berturut-turut pada perlakuan biokompos, kompos dan jerami dibanding tanpa bahan organik.…”

Section: Jumlah Anakanunclassified

Pengaruh Pemberian Variasi Bahan Organik Terhadap Peningkatan Produksi Padi dan Penurunan Emisi Metana (CH4) di Lahan Sawah Tadah Hujan

Yunianti

Yulianingrum

Ariani

2020

ecolab

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Budidaya tanaman padi memegang peranan penting dalam peningkatkan produksi pangan di Indonesia dan pembentukan emisi CH4 dari lahan sawah. Pemberian bahan organik ke dalam tanah berfungsi untuk memperbaiki kualitas tanah dan meningkatkan produktivitas tanaman, disisi lain dapat menyebabkan emisi gas rumah kaca. Besaran emisi CH4 akibat pemberian bahan organik tergantung pada kandungan C organik dan tingkat dekomposisinya. Pemilihan bahan organik yang tepat perlu dilakukan sebagai upaya untuk mengurangi emisi CH4 tanpa mengabaikan produktivitas tanah dan tanaman. Penelitian ini bertujuan untuk menentukan bahan organik yang dapat meningkatkan produktivitas sekaligus menekan emisi CH4 dari budidaya tanaman padi di lahan sawah tadah hujan. Penelitian ini dilaksanakan pada bulan Oktober 2016-Januari 2017 di Kebun Percobaan Balai Penelitian Lingkungan Pertanian, yang merupakan salah satu daerah tadah hujan di Kabupaten Pati, Provinsi Jawa Tengah. Penelitian disusun secara acak kelompok dengan 4 perlakuan yang diulang sebanyak 3 kali. Varietas padi yang digunakan dalam penelitian ini adalah Ciherang. Perlakuan terdiri dari : 1) kompos 5 ton/ha, 2) jerami padi 5 ton/ha, 3) biokompos 5 ton/ha, dan 4) tanpa bahan organik. Hasil penelitian menunjukkan bahwa produksi padi yang dihasilkan oleh empat perlakuan secara berturut-turut adalah 4,76; 5,13; 4,72 dan 4,61 ton/ha dengan total emisi CH4 153; 281; 197; 143 kg/ha/musim, sedangkan nilai produksi padi per kg CH4 yang dihasilkan secara berturut-turut adalah 31,1; 18,3; 24,0 dan 32,2. Pemberian bahan organik berupa kompos berpotensi lebih optimal dalam meningkatkan produksi padi dan menurunkan emisi CH4 di lahan sawah tadah hujan dibandingkan jerami padi dan biokompos.

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Aboveground morphological traits do not predict rice variety effects on CH4 emissions

Cited by 28 publications

References 35 publications

Optimizing rice plant photosynthate allocation reduces N2O emissions from paddy fields

Optimizing rice plant photosynthate allocation reduces N2O emissions from paddy fields

Contribution of rice variety renewal and agronomic innovations to yield improvement and greenhouse gas mitigation in China

Pengaruh Pemberian Variasi Bahan Organik Terhadap Peningkatan Produksi Padi dan Penurunan Emisi Metana (CH4) di Lahan Sawah Tadah Hujan

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