Nutrient Deficiency in the Rice-Stylo (<i>Stylosanthes guianensis)</i> Relay-Intercropping System in Rainfed Lowland Rice Ecosystem in Northeast Thailand

Homma, Koki; Mochizuki, Atsushi; Horie, Takeshi; Shiraiwa, Tatsuhiko; Supapoj, Nopporn

doi:10.1626/pps.12.390

Cited by 4 publications

(4 citation statements)

References 8 publications

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“…The dynamic character of farmer selection of organic materials suggests that they will be receptive to adopting new types of organic materials if these are compatible with their farming system. Earlier efforts by LDD to promote growing of green manure crops (e.g., stylosanthes and sesbania) in Northeast Thailand largely failed because farmers had to expend extra cash and labor to grow them but received no direct cash benefits in return (Homma et al, 2009). In contrast, adoption of sunn hemp has been relatively rapid since sale of the seeds provides some cash income to the farmers growing this crop.…”

Section: Discussionmentioning

confidence: 99%

Use of Organic Materials to Maintain Soil Quality by Thai-Lao Rice Farmers in Northeast Thailand

Yodda

Laohasiriwong

Rambo

2021

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Maintaining soil quality is a major problem for traditional farmers in the tropics. Many rely on organic amendments to enhance the productivity of their fields. However, indigenous knowledge about soil organic matter (SOM) and its management has received relatively little attention from researchers. This paper describes the use of organic materials to maintain soil quality by Thai-Lao farmers in a rice-growing village in Northeast Thailand. In-depth semi-structured interviews were conducted with twelve farmers to: 1) identify the indicators of soil fertility they employed; 2) inventory the organic materials they used; 3) determine changes in the use of amendments over time; and 4) understand their concept of SOM. They used many physical and biological indicators of soil quality. They used nine different organic materials: rice straw and stubble, cattle, buffalo and pig manure, rice husks, sunn hemp plants as green manure, charcoal, commercial compost, homemade compost, and tree leaf litter. Recently, use of livestock manure, rice husks, charcoal, and leaf litter has declined because of supply shortages. They do not appear to have a general concept of organic matter nor is there a commonly used word for “organic” in their language. Most of the farmers would use larger quantities of organic amendments but are constrained by their scarcity and high cost. Ways to increase local supplies of organic materials must be found if the government’s efforts to encourage the adoption of organic agriculture are to be successful.

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Section: Discussionmentioning

confidence: 99%

Use of Organic Materials to Maintain Soil Quality by Thai-Lao Rice Farmers in Northeast Thailand

Yodda

Laohasiriwong

Rambo

2021

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“…The experience obtained in Northeast Thailand encourages this concept of breaking mono-cropping of rice in rainfed lowlands. (Homma et al, 2008(Homma et al, , 2009 …”

Section: Discussionmentioning

confidence: 99%

Spatial Variations in Water Availability, Soil Fertility and Grain Yield in Rainfed Lowland Rice: A Case Study from Savannakhet Province, Lao PDR

Inthavong

Fukai

Tsubo

2011

Plant Production Science

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“…[34][35][36][37] Despite many studies on upland intercropping, less information is available on the intercropping in lowland fields. In recent years, just a few researchers have tried to conduct studies of rice intercropped with a variety of rice strains, 30 green manures such as Azolla and stylo, 38,39 and aquatic plants such as water chestnut and spinach. [40][41][42] However, to our knowledge, there is limited data available for rice intercropping with aquatic plants on pest control, crop production and total income, and grain quality in the paddy field.…”

Section: Introductionmentioning

confidence: 99%

Reduced pests, improved grain quality and greater total income: benefits of intercropping rice with Pontederia cordata

et al. 2021

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BACKGROUND: Intercropping, which is growing two or more different crops in the same field simultaneously, is an effective traditional agricultural practice for productivity, resource utilization, and pest control. However, study on intercropping in paddy fields is limited. So in this study, field experiments of 2 years/four seasons (early and late seasons in 2016 and 2017) were conducted to examine the effects of rice-Pontederia cordata intercropping on rice plant growth, pest control, yield, income, and grain quality.RESULTS: We found rice-P. cordata intercropping significantly decreased the occurrence of rice diseases and pests, with a 22.0-45.9% reduction in sheath blight and a 33.8-34.4% reduction in leaf folders. The mean land equivalent ratio (LER) (1.09) result indicates that intercropping rice and P. cordata generated positive yield effects. In addition, due to the economic profit from the replacement stripe of P. cordata in the rice paddy field, intercropping rice with P. cordata could greatly enhance farmer income. The average total income of rice intercropped with P. cordata was 2.5-fold higher than that of rice monoculture. Furthermore, intercropping significantly improved grain quality compared with the rice monoculture. It significantly increased the milled rice rate and whole milled rice rate by 11.2% and 12.8%, respectively, but decreased the chalky rice rate by 30.9-39.8% and chalkiness degree by 32.2%. CONCLUSIONS: We suggest that rice-P. cordata intercropping provides an environmentally effective way to control rice diseases and pests, results in higher overall productivity and total income, and improves grain quality.

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Nutrient Deficiency in the Rice-Stylo (Stylosanthes guianensis) Relay-Intercropping System in Rainfed Lowland Rice Ecosystem in Northeast Thailand

Cited by 4 publications

References 8 publications

Use of Organic Materials to Maintain Soil Quality by Thai-Lao Rice Farmers in Northeast Thailand

Use of Organic Materials to Maintain Soil Quality by Thai-Lao Rice Farmers in Northeast Thailand

Spatial Variations in Water Availability, Soil Fertility and Grain Yield in Rainfed Lowland Rice: A Case Study from Savannakhet Province, Lao PDR

Reduced pests, improved grain quality and greater total income: benefits of intercropping rice with Pontederia cordata

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