Yield and nutritive value response to row spacing and cultivar in forage rice

Abstract

Although the forage rice (Oryza sativa L.) cultivar 'Ruriaoba' has very high dry matter (DM) yield, it readily lodges after heading because of its high plant height. As a result, seed production and conventional cultivation of 'Ruriaoba' are very difficult. To improve this situation, we examined the effects of cultivar ('Ruriaoba' or 'Tachiaoba') and row spacing (30 [30-30-30-30] cm, 45 [30-30-30-45] cm, or 60 [30-30-30-60] cm) on the yield and nutritive value of forage rice. The lodging score of 'Tachiaoba' did not differ among row spacings but that of 'Ruriaoba' decreased with increasing row spacing. 'Ruriaoba' had lower grain yield than 'Tachiaoba'. Among its components, 'Ruriaoba' had fewer spikelets per m 2 , fewer spikelets per panicle and lower 1000-grain weight than 'Tachiaoba'. 'Ruriaoba' had fewer grains per m 2 than 'Tachiaoba'. Grain yield and its components did not differ among row spacings, nor did the number of grains per m 2 . Thus, 'Ruriaoba' planted at 60-cm row spacing may not decrease the grain yield and number of grains without lodging. This type of low-density planting of 'Ruriaoba' may be useful for seed production. At heading and yellow ripe stages, 'Ruriaoba' had higher DM yield than 'Tachiaoba' because 'Ruriaoba' had higher number of panicles than 'Tachiaoba'. Furthermore, 'Ruriaoba' had higher total digestible nutrients (TDN) yield than 'Tachiaoba'. At heading, DM yield decreased with increasing row spacing because the number of panicles decreased with increasing row spacing. Total digestible nutrients yield was lower at 45-and 60-cm row spacings than at 30-cm row spacing. However, at heading and yellow ripe, 'Ruriaoba' planted at 60-cm row spacing had DM and TDN yields similar to those of 'Tachiaoba' planted at 30-cm row spacing. Such low-density planting of 'Ruriaoba' may be an option for forage rice production.

A weather‐adaptive topdressing method to enhance rice yield in southwestern Japan

“…In this study, we proposed a novel topdressing method after analysis of the relationships between grain yield and growth‐related factors. Both grain yield and biomass are influenced by growing season, planting density, and cultivars in southwestern Japan (Nakano & Morita, 2009; Nakano & Tsuchiya, 2012; Nakano, Morita, Hattori, & Sato, 2008, Nakano et al., 2012, Nakano, Hattori, & Morita, 2014, 2019). Thus, examining the relationships between grain yield and growth‐related traits of rice plants grown under various cultivation methods is very important for further adjustment of this method.…”

Kesesuaian Ketinggian Tempat terhadap Penerapan Sistem Tanam Legowo untuk Peningkatan Produksi Padi

“…Kemampuan varietas padi dalam pembentukan anakan mempengaruhi jarak tanam dimana jumlah anakan akan meningkat dengan meningkatnya jarak tanam (Chowdhury 2010). Varietas padi tahan rebah cenderung memberikan hasil gabah lebih tinggi pada jarak tanam yang lebih rapat (Nakano et al 2014). Suprihatno dan Daradjat (2008) menyatakan varietas unggul padi modern di antaranya memiliki daun tegak, jumlah anakan banyak, postur tanaman pendek, dan mampu menangkap cahaya yang lebih baik sehingga fotosintat yang dihasilkan akan lebih banyak untuk membentuk gabah.…”

Fertilization packages increased growth and yield of Inpara 2 rice on tidal swampland of Aceh Jaya District

“…One of the efforts to increase fertilizer efficiency in swamps is applying of fertilizers according to the availability of nutrients in the soil, the varieties planted and rice planting system. Jajar legowo planting system is easy in plant maintenance (fertilization, pest control) and causes higher rice yields [8]. increasing rice production with the row legowo planting system must be supported by appropriate fertilization technology [9].…”