Effect of Digested Effluent of Manure on Soil Nutrient Content and Production of Dwarf Napier Grass in Southern Kyushu, Japan

Genotypic differences in forage quantity and quality of canopy strata in napiergrass (Pennisetum purpureum Schumach)

“…Percentage of LB was higher in DL than in 7734 and ME at both cuttings, except for June 15 th when the highest LB (100%) in both DL and ME occured, showing a simple index for crude protein concentration of herbages. LB percentage tended to increase from the first to the second cuttings across the 3 genotypes, corresponding with the previous study for DL (Hasyim et al, 2014), showing that the ratio of leaf blade to stem (LB/ST) was lower at the first cutting in the year of establishment than at the other 2 cuttings and tended to decrease with increasing DEM application across the seasons. In the first defoliation of DL napiergrass, when the plant height reached 111-132 cm, DM yield and LB percentage were recorded at 226-717 g DM m -2 and 61-87%, based on early pasture management practices for prompt weeding and fertilization , which was comparable to the present DL in the first cutting.…”

Quality Herbage Production of Dwarf Napiergrass with Italian Ryegrass Cropping under Digested Effluent Application in Southern Kyushu, Japan

“…Thus, it is worthwhile to omit the cost of purchasing DEM. From the present study on herbage yield and quality in dwarf napiergrass with Italian ryegrass, combining with the former study in the effect of DEM on soil and soil water environments and plant production (Hasyim et al, 2014), herbage yield and quality of dwarf napiergrass and Italian ryegrass increased in accordance with the increase in plant persistence of dwarf napiergrass with increasing DEM application rate up to 35 g N m −2 yr −1 , without influencing on the major changes in the environments.…”

“…Both crop nutrient requirements and soil properties are crucial factors to judge the proper agronomic practice of DEM as a fertilizer. Application of DEM to soil surface was proved to improve soil chemical properties without major contamination to the environments of arable lands (Hasyim et al, 2014). Several studies in Thailand (Rengsirikul et al, 2011) and Florida, USA (Woodard and Prine, 1993) noted that the recommended application rate at 20-30 g N m −2 are crucial to sustain high yield and quality in napiergrass.…”

Effect of Dehydrated Digested Effluent of Manure on Yield and Quality of Annual Forages and Soil Chemical Properties in Southern Kyushu, Japan

“…Soil EC tended to be lower in the NF treatment than in the other treatments in both cropping system. Changes in soil pH around neutral values and soil EC in a range of 0.05 -0.10 dS•m −1 were corresponding with those under liquid DEM application [11]. Total soil N content was significantly higher for the DDEM treatment than for the NF treatment, except at post-harvest of Italian ryegrass in the sorghum plus Italian ryegrass (S + IR) system.…”

“…In Japan, DEM was firstly applied to temperate perennial species such as orchard grass in Hokkaido regions [8], and the use of DEM as fertilizer may reduce operating costs of biogas plants [9]. In Miyazaki at the border of temperate and subtropical regions, applications of DEM to representative annual summer forage crops such as maize or sorghum combined with winter crop of Italian ryegrass [10] and perennial tropical napiergrass [11] resulted in similar dry matter crop production to the application of fertilizer application. However, as a liquid fertilizer, DEM is difficult to manage due to its low nutrient concentration, and ammonium nitrogen derived from liquid DEM was lost evidently due to the emission to the atmosphere [8].…”