Relay-Intercropping of Stylosanthes guianensis in Rainfed Lowland Rice Ecosystem 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

“…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 …”

High-yielding Crop Management by Enhancing Growth in Reproductive Stage of Direct-Seeded Rainfed Lowland Rice (Oryza sativaL.) in Northeast Thailand

“…In addition, the cost for seeds can be also reduced compared with conventionally recommended management when they buy new seeds (seeding rate in CM2 was about 31.3 kg ha -1 , which is only a quarter to one third of the recommended seeding rate in Ubon Ratchathani province, i.e., 90−125 kg ha -1 (Konboon, Y., personal communication)). Although a large amount of chemical fertilizer was used in CM2 than the recommended rate (45−50 kg N ha -1 (Naklang, 1997)) or actual rate in farmers' fields (on average 36 kg N ha -1 (Pandey et al, 2002)), the first application of chemical fertilizer (on about 30 d after seeding) can be replaced or its amount can be reduced by the application of manure from their own farmyard or by the use of green manure (e.g., Sesbania rostrata, Stylosanthes guianensis, Herrera et al, 1997;Homma et al, 2008) to reduce the cost for chemical fertilizer.…”

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

“…Since the management of ricestylo relay-intercropping has been described in detail in a previous report (Homma et al, 2008), we only briefly describe the method here.…”

“…We examined the capacity of the rice-stylo (Stylosanthes guianensis) relay-intercropping system to increase agricultural productivity in a rain-fed lowland rice ecosystem in Northeast Thailand ( Fig. 1; Homma et al, 2008). Stylo is a tropical leguminous forage crop, fallow crop or green manure crop (Becker and Johnson, 1998;Saito et al, 2006).…”

“…In the relay-intercropping system that we examined, stylo was grown by utilizing residual water and nutrients from rice cropping under non-irrigated and non-fertilized conditions during the dry season, when other crops were not cultivated. Homma et al (2008) reported that stylo produced plenty of biomass under such conditions in the first cropping season, up to 950 g m -2 , but the production in the second and the third cropping seasons was substantially decreased. This may be caused by the nutrient deficiency, because rain-fed paddy fields in Northeast Thailand generally have low soil fertility, and nutrient deficiency has been reported even in rice mono-cropping systems (Haefele et al, 2006).…”