Rice wars
Rice, the staple food crop for more than half the world’s
population, among them the poorest, is the current target of genetic
modification, an activity that has greatly intensified after the rice genome
was announced two years ago (see "Rice is life" series,
SiS 15, Summer 2002).
Since then, all major biotech giants are investing in rice research.
At the same time, a low-input cultivation system that really benefits
small farmers worldwide has been spreading, but is dismissed by the scientific
establishment as "unscientific". This is one among several recent innovations
that increase yields and ward off disease without costly and harmful inputs,
all enthusiastically and widely adopted by farmers.
A war is building up between the corporate establishment and the peoples
of the world for the possession of rice. The food security of billions is at
stake, as is their right to grow the varieties of rice they have created and
continue to create, and in the manner they choose.
This extended series will not be appearing all at once, so look out for
it.
Fantastic Rice Yields Fact or Fallacy?
Top Indian Rice Geneticist Rebuts SRI critics
Does SRI work?
Corporate Patents vs People in GM Rice
Promises and Perils of GM Rice
Two Rice Better Than One
One Bird - Ten Thousand Treasures
New Rice For Africa
ISIS Press Release 05/07/04
Top Indian Rice Geneticist Rebuts SRI Critics
Dr. A Satyanarayana responds to criticisms of SRI as someone
responsible for introducing the practice to the Andhra Pradesh state of India.
I read the news feature "Rice cultivation: feast or famine" in
Nature (25 March 2004) with great interest as I was responsible for
introducing the System of Rice Intensification (SRI) in the Indian state of
Andhra Pradesh since the kharif (summer) season of 2003.
I found the message conveyed by the article not quite balanced. The
experiences of farmers are very different from what is said by sceptical
scientists. Instead of trying to understand how a rice plant can respond
differently under an SRI environment, they are confused about the potential of
SRI, giving information based on rice cultivation under flooded conditions that
are definitely not SRI practice.
Having worked as a plant geneticist for over 3 decades on the genetic
improvement of leguminous crops under rice-based cropping systems, I have
released 34 varieties of various grain legumes that are widely adopted in
rice-pulse or rice-rice-pulse cropping systems covering over one million
hectares in the state. I have been responsible, from 1995 to 2000, for research
in the Krishna and Godavari deltas, which, with 1.5 million ha of rice-growing
area, are known as the rice bowl of Andhra Pradesh. At present, I am Director
of Extension for the state agricultural university (ANGRAU) and transfer of
technology is my job. So, I do know about the rice crop.
In January 2003, I was able to learn about SRI on a study tour to Sri
Lanka, and was amazed to see the potential of this system. On returning to
Andhra Pradesh, I started educating farmers on the skills involved in SRI and
motivated them to take up this system on a small scale in demonstration plots.
We planned to organise 50 demonstrations through ANGRAU’s extension
service and 150 through the State Department of Agriculture. But more than 300
farmers took up SRI during the summer season of 2003.
On average, the size of the demonstration plot was 0.4 ha, with the
largest at 1.6ha. As many as 10 different varieties, chosen by the farmers
themselves, were tried in all 22 districts of the state, under different soil
and irrigation systems. The results achieved were highly satisfactory, giving
an average yield advantage of over 2.0 t/ha. About 40 farmers got yields over
10t/ha, and 5 districts had average yields over 10t/ha. The highest recorded
was 16.2 t/ha followed by 15.7t/ha.
The average over all the demonstration plots was 8.36t/ha compared to
4.9 t/ha with conventional practice and the state average of 3.89t/ha. These
yields are not theoretical. They were properly recorded after thorough drying.
On seeing the performance of this system, many farmers volunteered to practice
SRI during the current winter season on more than 5 000 acres in the state.
Many farmers used SRI on over 10 acres. One farmer (Mr. N. V. R. K.
Raju) practiced SRI on over 100 acres (40ha.), and an average yield of more
than 10 t/ha is expected. I request sceptics to visit Andhra Pradesh and see
SRI in practice before drawing conclusions.
Under SRI, the rice crop is maturing 10 days earlier than with usual
cultivation practices, irrespective of the variety, which is contrary to what
was stated in the Nature news feature, that SRI takes two weeks longer
to mature. Also, SRI required less water and less chemical inputs. SRI gave
higher grain as well as straw yield. Moreover, the SRI rice crop has withstood
cyclonic gales and a cold spell.
It is unfortunate to say in the headlines of the news feature that
proponents call SRI a "miracle". No one has ever said this because SRI results
are quite explainable. Planting young seedlings carefully and at wider spacing
gives the plant more time and space for tillering and root growth. Careful
water management keeping the field wet and not flooded gives better yield
because it supports healthy root growth. This practice should be encouraged
everywhere as the whole world is facing water shortages. Weeding rice fields
with a rotary weeder helps by churning the soil and incorporating the weed
biomass as it aerates the root zone. This encourages the soil microorganisms to
proliferate and makes the soil living and healthy. All of these practices are
known to agronomists, and there is nothing new or magical.
The productivity of SRI as a function of input is very high, which is
more important now as the Green Revolution technologies are showing fatigue.
SRI has the potential to give higher yields at lower costs. Even when the
farmers were unable to practice all the aspects the first season, just planting
young seedlings carefully at wider spacing with somewhat better water
management resulted in over 2.0t/ha extra yield compared to conventional
methods using higher inputs. With more experience and mastering of skills,
still higher yields are possible, as those obtained by the best farmers clearly
suggest.
Rice yields all over the world have leveled out under the present system
of flooded cultivation. Genotype x environment interactions are known to affect
the plants’ phenotype and performance. We need to be looking for
alternatives to the present costly practices with an open mind. SRI is still
evolving with the innovations of the farmers making implements and practices
more labour-saving.
There is more than enough evidence accumulated here and elsewhere for
scientists to take SRI seriously. I hope that the scientific community will
collaborate in further research. Possibly it can refine the technology and
reveal the factors responsible for the higher productivity observed. That would
be more constructive and more in the spirit of science than dismissing it with
limited or faulty data and preconceptions.
The author is Director of Extension, Acharya N. G. Ranga Agricultural
University, Hyderabad-500030, Andhra Pradesh, India, and this article is
adapted from his response to the Nature news feature mentioned.
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