Land use efficiency and productivity of rice (Oryza sativa) under various irrigation regimes and intercropping system

Abstract

A field experiment was conducted at Tamil Nadu Rice Research Institute, Aduthurai to assess the land use efficiency and productivity of rice under intercropping system. Treatments consisted of six irrigation regimes viz., IW (depth of irrigation water) / CPE (Cumulative pan evaporation) ratio 1 up to harvest, IW/CPE 0.75 up to 60 days thereafter IW/CPE 1, IW/CPE 0.75 up to 60 days thereafter IW/CPE 1.25, IW/CPE 0.75 up to 60 days thereafter IW/CPE 1.50, IW/CPE 1 up to 60 days thereafter IW/CPE 1.25 and IW/CPE 1 up to 60 days thereafter IW/CPE 1.50 and three cropping system viz., Rice alone, Rice + Blackgram and Rice + Greengram. Results revealed that application of irrigation water at different levels and cropping systems markedly influenced the growth, yield components and yield of rice. The maximum value of growth and yield components were recorded with the application of irrigation IW/CPE ratio of 1 up to 60 days thereafter IW/CPE ratio of 1.50 and among the cropping systems aerobic rice alone showed significantly higher growth and yield. Water productivity is higher in irrigation with IW/CPE ratio of 1 up to 60 days thereafter 1.50. The land equivalent ratio (LER) also revealed both the intercropping systems were advantageous. The results encourage the options of pulses could be grown as inter crop in rice.

Study the Irrigation Scheduling and Intercrop Practices on Yield Attributes, Yield, Water Use Efficiency and Economics of Aerobic Rice

“…High level of dry matter production and efficient translocation of photosynthates from source to sink might be responsible for producing an increased level of yield. (Subramanian et al, 2020). This result clearly indicated that irrigation with lesser IW/CPE during early stages followed by higher IW/CPE during later stages proved to be the irrigation strategies for the aerobic rice system.…”

“…So, to increase the farm productivity and overall income for the farmers, a short duration suitable crop was introduced as intercrop. Intercropping in rice increases the productivity, profitability, and effective utilization of soil, water, nutrients and sunlight compared to sole crop (Subramanian et al, 2020). Thus, it is believed that efficient utilization of resources results in yield advantages.…”

Irrigation Scheduling and Intercropping on Growth and Yield of Aerobic Rice

“…In addition to aerobic rice offers the new scope to introduce intercrops on par with other arable crops. Growing of short duration pulses in-between the aerobic rice is the recent advancement to fulfil the requirement of pulses as well as food grains without any reduction of the agricultural area (Subramanian et al, 2020). Keeping this in view, the present study was carried out to study on irrigation scheduling and intercropping on growth and yield of aerobic rice.…”