Deeper tillage and root growth in annual rice-upland cropping systems result in improved rice yield and economic profit relative to rice monoculture

Linh, Tran Ba; Sleutel, Steven; Thi, Guong Vo; Van, Khoa Le; Cornelis, Wim

doi:10.1016/j.still.2015.06.011

Cited by 30 publications

(24 citation statements)

References 22 publications

(25 reference statements)

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“…This was the case at 20-30 cm depth, which reflects the presence of a compacted layer at 20-30 cm depth in R-R-R system and absence of such layer in cropping systems with rotations of rice and upland crops. Indeed, in former research performed on the same experimental field, Linh et al (2015aLinh et al ( , 2016 reported that soil BD and soil penetration resistance at 20-30 cm of R-R-R system were clearly higher than those of the puddle layer. This is mainly due to repeated shallow tillage activity three times per year with machinery trafficking for land preparation under wet conditions for rice monoculture for more than 30 years.…”

Section: Discussionmentioning

confidence: 93%

“…The low (temporal) within season variation of cropping systems with upland crop rotations compared to intensive rice monoculture system could be explained by aggregates being more stable as reflected by their higher soil aggregate stability index (Figure , Linh et al, ). This can be attributed to higher soil organic carbon quantity and quality in R–M–R, R–Mb–R and M‐Mb‐M than R–R–R as reported by Linh et al (, ) (Figure ). A strong relation between soil organic matter and aggregate stability was also found by other authors (Ternan et al, ; Costa et al, ; Gelaw et al, ).…”

Section: Discussionmentioning

confidence: 99%

“…Soil aggregate stability index for the different crop rotation systems at three different depths (taken from Linh et al, ). [Colour figure can be viewed at wileyonlinelibrary.com]…”

Section: Discussionmentioning

confidence: 99%

“…The advantage of this compaction layer is to limit water drainage, thus keeping floodwaters on the rice field (Sharma & De Datta, 1986;Tomar, 1997). However, development of a shallow compacted layer aggravates paddy land degradation and decreases rice yield (Linh et al, 2014(Linh et al, , 2015a. The reverse was observed in cropping systems of rice rotated with upland crops.…”

Section: Discussionmentioning

confidence: 99%

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Temporal Variation of Hydro‐Physical Properties of Paddy Clay Soil under Different Rice‐Based Cropping Systems

et al. 2017

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Spatial variability of hydro‐physical properties has long been observed, whereas temporal variation is much less documented and considered in studies and applications, particularly of paddy clay soils under different cropping systems. The objective of this study was therefore to assess the seasonal‐ and inter‐seasonal variation of selected hydro‐physical properties of a paddy clay soil under different rice‐based cropping systems with contrasting tillage. In a long‐term experiment, plots were arranged in a randomized complete block design with four treatments and four replications: (i) rice–rice–rice; (ii) rice–maize–rice; (iii) rice–mung bean–rice; and (iv) rice–mung bean–maize. Soil samples were collected at three depths (0–10, 10–20 and 20–30 cm) at three times during two cropping seasons, i.e., 15 days after soil preparation (DASP), 45 DASP and 90 DASP during the winter–spring and spring–summer seasons. Results show that temporal variability of soil bulk density, macro‐porosity (MacP) and matrix‐porosity within both seasons and between seasons was limited for cropping systems with upland crop rotations, whereas within season variation was significant for rice monoculture system. Observed variation in bulk density, matrix‐porosity and MacP was mainly associated with cropping system and soil depth. Field saturated hydraulic conductivity of topsoil showed great temporal variability, both seasonal and inter‐seasonal, in correspondence with MacP (r = 0·58). These results highlight the need of depth differentiated soil sampling and time consideration when evaluating management practices on soil physical properties and modeling the hydrological behavior of paddy soil. Copyright © 2017 John Wiley & Sons, Ltd.

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Section: Discussionmentioning

confidence: 93%

Section: Discussionmentioning

confidence: 99%

“…Soil aggregate stability index for the different crop rotation systems at three different depths (taken from Linh et al, ). [Colour figure can be viewed at wileyonlinelibrary.com]…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Temporal Variation of Hydro‐Physical Properties of Paddy Clay Soil under Different Rice‐Based Cropping Systems

et al. 2017

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“…Overall, the mean annual rice yields were relatively high across southern China since the percentage of the low‐productivity rice yield areas (< 5.25 t ha −1 ) is small in southern China. The annual mean rice yield in this area was also much greater than that in some areas of Africa and Europe (Linh, Sleutel, Thi, Van, & Cornelis, ; Saito, Azoma, & Oikeh, ). The coefficient of variation (CV) is an index to exhibit the overall heterogeneity of a variable.…”

Section: Resultsmentioning

confidence: 67%

Use of partial least squares regression to identify factors controlling rice yield in Southern China

Duan

Xie

et al. 2020

Agronomy Journal

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Identification of the dominant factors controlling rice (Oryza sativa L.) yield is of paramount importance to improve fertilizer use efficiency, effectively promote rice productivity, and help ensure food security. The objective of this study was to quantify the influence of geographic attributes, soil properties, climatic, and fertilizer types on annual rice yield and to identify the dominant control factors in southern China. In total, 2010 soil samples were collected in the selected areas and were analyzed for 34 factors that potentially influenced rice yield. Because these factors exhibit multicollinearity, partial least squares regression (PLSR) was used to elucidate the linkages between rice yield and the 34 measured variables. The first‐order factors were identified by calculating the variable importance for the projection (VIP). The variables with high VIP values are the most relevant for explaining the dependent variables. Results indicated that the geographic attributes, climatic and fertilizer types exerted substantial influence on rice yield and explained 57 to 85% of the variation in rice yield. According to the VIP values, the following are the dominant first‐order factors controlling rice yield: longitude, latitude, organic potassium fertilizer, accumulated temperature ≥ 10°C, chemical potassium fertilizer, organic nitrogen fertilizer, straw incorporation, chemical nitrogen fertilizer, accumulated temperature ≥ 0°C, and organic phosphate fertilizer. These results indicate that the PLSR approach is beneficial as it partially eliminates the correlation of the variables and reduces bias regarding the contribution of the factors to rice yield. This approach could be applied to other climatic zones or cropping systems.

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Effects of rainfall characteristics on bromide leaching in a typical tobacco field in China's Yunnan Province

Zou

Zhang

Yang

et al. 2023

Soil Science Soc of Amer J

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Knowledge about water and solute transport in the vadose zone is critical for agrochemical management, especially for the tobacco cultivation characterized by extensive fertilizer and pesticide applications. Under the field conditions, however, natural soil heterogeneity complicates and limits the analysis of water and solute transport. Applying the scale-dependent treatment distribution in a rainfall simulation experiment, the objective was to evaluate the impact of rainfall characteristics on bromide (Br − ) leaching in a typical tobacco field in China's Yunnan Province. On a transect established with 24 plots, rainfall amount, intensity, and time delay relative to solute application were arranged in cyclic patterns at different spatial scales.Soil samples in 10-cm increments down to 50 cm depth were collected for Br − determination after the simulated rainfall. The results display a significantly decreasing trend of Br − concentration with depth, suggesting the predominance of matrix diffusion over preferential flow at the scale of investigation in the intensively cultivated tobacco field. The Pearson correlation analysis only detected significant associations of Br − with rainfall intensity at the 0-10 cm depth and with rainfall amount at the 20-30 cm. With the aid of frequency-domain analysis, by comparison, strong spatial correlations were revealed with rainfall characteristics at each depth, even with the presence of a plow pan at the depth of 30-40 cm due to deep tillage. Although the dominant control of Br − distribution varied with depth, these findings demonstrate the profound effects of rainfall characteristics on solute leaching and the usefulness of scale-dependent treatment distribution in field-scale investigations of solute transport as well as other hydrological processes.

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Deeper tillage and root growth in annual rice-upland cropping systems result in improved rice yield and economic profit relative to rice monoculture

Cited by 30 publications

References 22 publications

Temporal Variation of Hydro‐Physical Properties of Paddy Clay Soil under Different Rice‐Based Cropping Systems

Temporal Variation of Hydro‐Physical Properties of Paddy Clay Soil under Different Rice‐Based Cropping Systems

Use of partial least squares regression to identify factors controlling rice yield in Southern China

Effects of rainfall characteristics on bromide leaching in a typical tobacco field in China's Yunnan Province

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