Effect of irrigation regimes, mid-season drainage and time of application of nitrogen on growth and yield of hybrid rice

Abstract

Field experiments were conducted at the Central Farm of the Agricultural College and Research Institute, Madurai, India during the rabi (October-January) seasons of 1999-2000 and 2000-2001 in a split plot design with three replications. The soil of the experiments was sandy clay loam with a neutral reaction. The main plot consisted of six irrigation schedules with mid-season drainage, while four N splits were taken as sub- plots. The experimental results revealed that irrigation to a depth of 5 cm one day after the disappearance of ponded water and mid-season drainage, along with N applied in four splits, with 16.7% at 10 days after transplanting, 33.3% at active tillering, 33.3% at panicle initiation and 16.7% at the heading stage, produced significantly higher growth, yield attributes, grain and straw yields in hybrid rice. A combination of the above treatments led to maximum grain yields of 7533 and 8078 kg ha-1 (45.53 and 45.86% in excess of the control) in 1999-2000 and 2000-2001, respectively.

Effect of Application of Rice Straw Compost and NPK Fertilizers Under Some Irrigation Regimes on Grain Yield and Water Productivity of Ehr1 Hybrid Rice Cultivar

“…These results are in agreement with the findings of Chandrasekaran (1996) and Jayakumar and Krishnasamy (2005). Data in Table 2, also, revealed that growth attributes (number of days to 50 % heading, DM production, LAI and plant height) were significantly affected by combination between composted rice straw and NPK rates.…”

“…One way for increasing water use efficiency, in rice growing, is alternating wet and dry irrigation (AWDI) method; viz., irrigation to submerge to a particular depth after disappearance of ponded water, in which rice fields are not kept continuously submerged, but, are allowed to dry, intermittently, during the rice growing stages. The beneficial effect of this irrigation practice was water saving and grain yield improvement in rice cultivars (Jayakumar and Krishnasamy, 2005). Intermittent irrigation regimes have been developed in some rice-production regions in attempts to reduce volumes of irrigation water and save water, where, Masian and Vijaykumar (1993) found that applying 5 cm of water at two days after disappearance of ponded water (DADPW) did not significantly reduce grain yield, but, it saved considerable water and had the highest water use efficiency, compared to continuous submergence.…”

Effect of Split Application of Nitrogen Fertilizer on Morpho-Physiological Attributes and Grain Yield of Broadcast Seeded Egyptian Hybrid Rice (Ι)

“…Nitrogen application at late growth stages delayed leaf aging and increased activity of root and the three active leaves during grain filling rate and reduced the sterility percentage which greatly increased grain yield. These results are in pertinence with those reported by Peng et al (1998), Edwin et al (2004), JayaKumar et al (2004, Mohammed (2006), Arafat (2007), El-Kallawy (2008) and Sathiya and Ramesh (2009).…”

“…The heaviest 1000-grain weights (26.08 & 26.29 g) in the first and second seasons, respectively were produced with the sixth treatment T6 (1/4 as basal +1/4 at MT+1/4 at PI+ 1/4 at flowering) without significant differences with the fourth, third and second treatments (T4,T3 &T2).Whereas, the lightest 1000-grain weights (24.87 & 24.92 g) in 2011 and 2012 seasons, were obtained from the first treatment T1 (2/3 as basal +1/3 at panicle initiation) was applied without significant differences with the fifth treatment T5 ( 1/4 as basal + 1/4 at MT + 1/4 at BT + 1/4 at complete heading ). Similar trend was obtained by Surekha et al (1999), Jayakumar et al (2004) and El-Kallawy (2008).…”

Influence of Seedling Age and Nitrogen Rates on Productivity of Rice (<i>Oryza sativa</i> L.): A Review

“…Increased grain yield by high rates of applied nitrogen may be due to the favorable growth with higher nutrient uptake, more translocation of carbohydrates towards the sink which increased yield attributes and resulted in producing higher grain yield [39]. Higher HI in younger seedlings might be due to the better crop growth, development and assimilates translocation to the grains, similar findings were reported by [25].…”