Welcome to Jain Irrigation Systems Ltd.
P. SomanChief Agronomist, Jain Irrigation Systems Ltd
A. K. Bhardwaj Senior Agronomist , Jain Irrigation systems Ltd
Urs Heierli Consultant, Jain Irrigation systems Ltd
B. K. Labh Senior Engineer, Jain Irrigation systems Ltd
India is the world’s second largest producer of Rice. It is cultivated over an area of 44.2 million ha, which is about 50 % of the total irrigated agriculture area of the country (1). Short duration rice cultivation in rainy season (Kharif) is common in almost all States, however its cultivation is more concentrated in Northern States of Haryana and Punjab besides Eastern states and the Southern Peninsula.
Traditionally, low land rice or wet rice is cultivated in puddled soil as semi-aquatic crop. Under the low land system, water is consumed as much as 2295 mm/ha and 3000- 5000 liters utilized by the crop to produce one kg of grain .The water productivity is as low as 0.15 kg/m3 in some cases . The excessive use of irrigation water for rice production is a major socioeconomic, environmental and health concern for the region . Several rice importers work in Haryana, for example, buying paddy from small holder farmers. The water footprint of these exports is extremely high and uncomfortable to afford.
Rice is also cultivated as dry land crop under rain-fed conditions in about 28 % area, by ploughing and harrowing the field dry and by direct sowing of the seeds. Such aerobic rice system, specially evolved rice varieties are cultivated as in Upland system with irrigation. The seeds sown directly (DSR) and the soil moisture maintained to field capacity throughout the period of crop growth. Compared with traditional low land rice system, water inputs in aerobic rice system were less than 50% (470-650 mm), water productivity 64-88% higher, and labour use was 55% lower (4-5). These studies however did not separate the labour requirement for weeding per se.
Rice-Wheat Cropping System is predominant cropping system of India. Haryana has Rice- Wheat cropping system as irrigated and rain-fed crops. Farmers still use the conventional practices of irrigation and method of cultivation of rice so that the water table in Haryana is declining at a rate of 30-50 cm per year. The water table in 1970 was around 5 meter which has become 38-40 meter at present because of decline. The water productivity of rice is said to be 400 g/m3. Keeping this in mind the Water Productivity Project, WAPRO has been launched in Haryana, in 2018 by the active contribution and participation and co-funding of the Swiss Agency for Development and Cooperation (SDC), Helvettas, Mars, LT foods, Jain Irrigation Systems Ltd., and Partners in Prosperity. The data which form the basis of this paper is collected by Jain Irrigation scientists as part of the collaboration with WAPRO.
All the farmers have been irrigating the land through ground water extraction from bore wells. Rice based cropping system is the predominant cropping system in the four districts. The average productivity of Coarse Rice is about 4-5 t/ha and for Basmati is around 2.5-3 t/ha. The average rainfall in Haryana is low during the rainy season. Around more than 75% of irrigation water has been ground water. A pre-project survey indicated that in spite of declining water table farmers are pumping water for irrigation without any restriction.
The farmers are using huge volumes of water for getting a good yield. They are of the view that if the resource conservation technologies like drip irrigation technique are demonstrated in a field they are ready to use those technique.
At Jain Irrigation, we have come up with a solution. Irrigating rice crop with drip-fertigation technology reduces water consumption and methane emission besides increasing rice productivity. Soman (4) and Soman et al. (5) reported that aerobic rice hybrid ADT-45 and genotypes 27-P31,27-P63, PHB-71,ARIZE-6129,and ARIZE-6444 using drip irrigation with poly/paddy husk mulch, produced yields 4.5t-8.19 t/ha, harvested early by 8-10 days,17.7 to 25.2 % more yield than the conventional flooded cultivation system and in 27-P31, the maximum water productivity was 0.713 kg grain/m3 water. Anusha and Nagaraju (6) compared rice genotypes under drip irrigation with conventional puddled and transplanted system and observed that across genotypes drip irrigated rice recorded significantly higher yield 7934 kg/ha, 19% higher than that of conventional flood system(6659 kg/ha),resulted in 58% water saving. Water productivity was highest under drip (11.80 Kg/ha mm) as compared to puddled and transplanted rice 4.17 kg/ha mm.
We continued our interventions with drip-fertigation in the Basmati growers’ belt in Southern Haryana. This paper describes on-farm results of the work done Haryana in the frame of WAPRO.
MATERIAL AND METHODS
This on- farm study is part of the project –"Water Productivity in Cotton and Rice" ( WAPRO) phase II. Under this project SDC funded a part of the cost of drip systems supplied to the project farmers and Jain Irrigation, the technology provider, besides implementing the project and providing agronomy support to the farmers also provided part finance for the drip systems. The project farmers are all Basmati growers from Kaithal, Kurukshetra and Ambala districts of Haryana. Jain team has identified some 19 farmers in these districts who agreed to take up drip irrigated rice cultivation. The farms could be installed with drip during the planting season, Kharif 2019.
Data on yield, rain fall, irrigation water, fertilizer use, and yield of these fields were monitored. Detailed data on yield components (yield, tiller number per hill, gran per panicle and grain weight) were also recorded. In this paper, however we stress on yield and water productivity only.
We had already standardized package of practices (POP) for drip irrigated rice cultivation after 12 years of experimental and demonstration trials in many parts of India in farmers’ fields. (Soman et al 2018). Generally, the package consists of the following steps.
The irrigation schedule and fertigation program adopted in these farmer fields are given in Table 1 and 2 respectively.
Table 1. Irrigation schedule for Drip method for rice in Kurukshetra, Haryana $
|June 15- June 30||5.3||1960|
|July 1- July 15||5.0||11890|
|July 16- July 31||4.3||12105|
|Aug 1 -Aug 15||4.7||17547|
|Aug 15 - Aug 31||4.5||16684|
|Sept 1 - Sept 15||4.7||14540|
|Sept 16 - Sept 30||4.4||13724|
|Oct 1- Oct 15||5.3||13118|
Table 2. Fertigation schedule for rice adopted in the farmers’ fields
|Growth Stage||Days after
|Vegetative||20-59 DAP||39 days||2.1 kg UREA per day or 14.7 kg /week
1 kg MKP per week for 5 weeks
2.5 kg MgSO4 per week for 4 weeks
2 kg Zn EDTA per week for 5 weeks
|Reproductive||60-89 DAP||29 days||5.1 kg UREA per week for 4 weeks
1 kg MOP per week for 4 weeks
1 kg Zn EDTA per week for 3 weeks (Last dose only 0.5 kg)
|Grain Maturity||90-115 DAP||25 days||3 kg MOP per week for 3 weeks. (last dose only 1 kg)|
RESULTS AND DISCUSSION
Under conventional flood yield ranged from 2.75 to 7.5 t/ha across different rice varieties; and under drip irrigation it ranged from 2.5 to 8.1 t/ha, (fig 1). The varietal difference in yield is very dominant and is expressed both under flood and drip methods of irrigation. The overall shift in yield because of drip irrigation hovered around 10-18%. Overall, transplanted rice yielded more both in flood and drip (fig 2). The most used variety is PB 1509 by these farmers; its yield differences in flood and drip respectively in DSR and TPR planting systems clearly demonstrates the impact of drip method of irrigation in enhancing rice yield (fig 3). Drip out- yielded in both DSR and TPR.
Fig 1. Yield under flood and drip methods of irrigation in the different farmers’ fields
Fig 2 Mean yield under flood and drip in DSR and TPR methods of plantation
Fig 3. Yield differences for the most used variety (PB 1509) under flood and drip respectively in DSR and TPR
Irrigation water consumption for one season Average irrigation water consumption in flooded fields is 6324.5 m3/ac/season and in drip fields 3084 m3/ac; Drip method releases an average 3240.5 m3 water/ac for other uses (fig 4). Average water consumption under TPR was more; TPR flood uses 6850 m3/season and TPR drip uses 3434 m3, and under DSR Flood the water consumption is 6384 m3 and DSR drip it is 2969 m3. The savings in water in drip irrigated rice fields and increased water productivity and grain yields under aerobic rice systems have been already reported by Soman et al (5 and 7) and Anusha and Nagaraj (6).
Irrigation Water productivity (IWP) The water productivity (based on irrigation water only) was always superior in drip irrigated rice –trending around 0.8 kg paddy grain/m3 as against 0.3 kg/m3 in flood irrigated fields (fig 5).The Water productivity was then analysed separately for Direct seeded (DSR) and Transplanted rice (TPR) crops. TPR has marginally higher water productivity than DSR in both methods of irrigation (fig 6). This is an exception from the observations that D SR is superior to TPR in water productivity. This exception can be due to the high rainfall received during the season. Irrigation water productivity (IWP) even of a single variety of rice can’t be a constant figure in different locations and under various crop management methods and crop seasons. IWP is also not just depended on water consumption alone, as other inputs affect the productivity. Even in our own work (5) the Irrigation water productivity obtained in flood and drip irrigated situations differed in absolute values from those obtained in this study. But a comparison of IWP in flood and drip methods of irrigation is relevant for similar crop management situations in the same season.
Fig 4. Irrigation water consumption in flood and drip methods of irrigation
Fig 5. Irrigation water productivity of single season rice under flood and drip methods of irrigation
Fig 6. Water productivity in food and drip method of irrigation under DSR and TPR planting systems
The summary of the benefits obtained from drip irrigating rice is given below (Table 3). Irrigation water consumption is reduced by 51% compared to flood irrigation. There is a slight (3%) difference in water consumption by DSR and TPR methods of planting. Because of heavy rains at the early season the water required for puddling operations were mostly satisfied by rainfall hence the difference between irrigation water consumption by DSR and TPR is very low. Irrigation water productivity improved by more than 100% when drip irrigated.
Table 3. Summary of the benefits from drip irrigating Basmati rice in Haryana in farmers’ fields
|Factor||Flood m3/ac||Drip m3/ac||Saving||%|
|Average irrigation water consumption (AVG)||6324.5||3084||3240.5||51%|
|Water productivity (kg/m3 water)||0.300||0.800||0.500||63%|
Authors acknowledge the financial contribution made by SDC and Jain Irrigation Systems Ltd., and the astute interest and support shown by the WAPRO partners, Helvetas, Mars, PnP and LT foods for this study. They also express gratitude to Jain Irrigation Systems Ltd., India in approving to participate in the study and Irrigation Engineer Mr. Aravind Gupta for installing the drip systems in the different farmers’ fields. We also thank the farmers who participated in the project and showed readiness to learn new Agronomic steps from the trainers.
.Anon, (2016) Area and Production of Rice in India. Agricultural Statistics at a glance-Directorate of Economics and Statistics, Govt. of India, New Delhi.
.Dawe. D. (2005) Increasing water productivity in rice-based system in Asia-Past trends, current problems and future prospects. Plant Production Sci.8-221-230.
.Ghosh. A, Singh. O. N, Rao, K. S. (2010).Improving irrigation management in dry season cultivation for optimum crop and water productivity in non-traditional rice ecologies. Irrigation and Drainage 60 (2) 174-178.
. Soman. P (2012): Drip Irrigation and Fertigation Technology for Rice cultivation: Asian Irrigation Forum, Asian development Bank, Manila, April 11-13, 2012. ADB. Manila. Philippines.
. Soman. P., Sundar Singh, Balasubrahmanyam, V.R. and Chaudhary Amol. (2018) Evaluation of the performance of aerobic rice using drip irrigation technology under tropical conditions. International J. of Agri.Sci. 10(10)6040-43
.Anusha. S and Nagaraju (2015) Performance of rice genotypes under drip irrigation in comparison with aerobic and puddled and transplanted condition. Mysore J of Agril.Sci.49 (2)193-197.
. Soman, P. Sarwan Singh, A. K. Bharadwaj, T. Pandiaraj, and R. K. Bhradwaj (2018) On-fram drip irrigation in rice for higher productivity and profitability in Haryana, India. International Journal of Current Microbiology and Applied Science. 7 (2).