Paddy Cultivation

Introduction Rice is the staple food of more than 60% of the world’s population. It is the staple food of most of the people of South-Eastern Asia. About 90% of all rice grown in the world is produced and consumed in the Asian region.

Nutritional values Nutritional value per 100 g 3 Energy : 1,527 kJ (365 kcal) Sugars : 0.12 g Protein : 7.12 g Dietary fiber : 1.3 g Thiamine : mg Riboflavin : mg (1%) Zinc : 1.09 mg Calcium : 28 mg Iron : 0.80 mg Magnesium : 25 mg Surce: USDA Nutrient database

Origin and History Rice cultivation probably dates back to the antiquity and has probably been the staple food and the first cultivated crop in Asia. Vavilov (1926) suggested that India and Burma should be regarded as the centre of origin of cultivated rice.

Climatic requirements Rice crop needs a hot and humid climate the average temperature required throught the life period of the crop ranges from o C. At the time of tillering the crop requires a higher temperature than for growth. Temperature requirement for blooming is in the range of o C. At the time of ripening the temperature should be between c.

Soil Soil Soil having good water retentions capacity with good amount of clay and organic matter are ideal for rice cultivation. Clay or clay loams are most suited for rice cultivation it grows well in soils having a pH between

Cropping System (A) Irrigated Areas 1. Rice-Wheat 2. Rice-Potato-Urd 3. Rice-Toria-Wheat 4. Rice-Wheat-Moong (B) Un-irrigated Area 1. Rice-Chickpea 2. Rice-Lentil 3. Rice-Field Pea

Cultivation Cultivation The following are the principal systems of rice cultivation;- 1. Dry or semi-dry upland cultivation (a) Broadcasting the seed (b) Sowing the seed behind the plough or drill 2. Wet or lowland cultivation (a) Transplanting in puddle soils (b) Broadcasting sprouted seeds in puddle soils

Seed rate Broadcasting- Use about 100 kg seed/ha. Sowing seed behind the plough or drilling. Use about 60kg seed/ha. The row to row distance should be 20cm.

Fertilizer Application

Nitrogen – 60 kg/ha. Phosphorus- 30kg/ha. Potash - 30 kg/ha. Total quantity of phosphorus and potash and 25% of the total nitrogen should be applied in the soil at the time of land preparation. After days of sowing or at tillering stage, top dress 50 % of the total nitrogen. The remaining 25% nitrogen should be top dressed at panicle initiation stage.

Application of Seaweed Extract Liquid Importance of Soaking of Seed: Seeds soaked in Seaweed Extract Liquid before placing in the nursery beds gives better and healthy germination. Care should be taken for prevention of excessive wetting and rotting. The soaking time may vary from 1hr -10hr. Allow the seeds to dry before sowing. After the seed soaking, the balance water to be used in the same field.

Application of Seaweed Extract Liquid Importance of seedling treatment of root dipping: The seedlings are wetted and or roots dipped in Seaweed Extract Liquid for about one hour before transplanting shock and thereby better post transplanting survival rate.

Application of Seaweed Extract Liquid Importance of different stages of spray: 1st spray should begiven when plants have attained the teo leaf or rosette stage. This spray is more important than other sprays. The gap between two sprays to be maintained at days. For short duration crops minimum 2 sprays required. And long duration crops need more sprays. After flowering stage, spray is not required.

Application of Seaweed Extract Liquid Seed Treatment: 10 ml/ 4 lit. of water, soak the seeds minimum 4 Hrs. Seedling Treatment: 10 ml / 4 lit. of water, soak the seedlings atleast 4 Hrs. Spray: (250 ml /100 lit of water) After 15 days of transplanting 1st spray then minimum 2 sprays in 20 days gap.

Wet or lowland cultivation This system of rice culture is practiced where there is an assured and adequate supply of water. Transplanting Method Raising Seedling in Nursery- For transplanting one hectare area about 500 square meter area is sufficient for nursery raising. In case of late sowing area of nursery should be increased to square meter. In case of bold grain varieties, about kg seed would be required to raise seedling enough for one hectare, whereas for fine grain varieties kg seed is enough.

Methods of Raising Seedlings Wet Bed Method - Wet nurseries are preferred under irrigated condition. Dry Bed Method – This method is practised in areas where water is not sufficient to grow seedlings in wet nurseries. Dapog Method – The main merit of this method is that less area is needed to raise seedlings square metres of area is enough to raise seedling sufficient for planting one hectare.

Transplanting Transplanting of healthy seedlings may be done at the 4-5 leaf stage or when they are about cm high. Transplant 2-3 seedlings per hill at 20X10 cm distance under normal conditions. Broadcasting Sprouted Seeds In Puddle Soils:- This method is adopted in areas where there is shortage of laboures or otherwise labour is very expensive for transplanting. About 100 Kg. seed is required for one hectare.

Fertilizer Application Spray: (250 ml /100 lit of water) After 15 days of transplanting 1st spray then minimum 2 sprays in 20 days gap.

Water Management The water requirement is high during the initial seedling period covering about 10 days. Tillering to flowering is the most critical stage when rice crop should not be subjected to any moisture stress. Ensure enough water from panicle initiation stage to flowering.

The most commonly found weeds in transplanted rice are given below:- 1.Echinochloa colonum 2.Echinochloa crusgalli 3.Cyperus iria 4.Eclipta alba 5.Setaria glauca Weeds should be removed once at 20 days after transplanting ( before first top dressing) and second time at days after transplanting (before second top dressing ). Grow resistant variety and Use Seaweed Extract Liquid Weed Control

Diseases Blast Casual organism:- Pyricularia oryzae Symptoms:- Boat or eye- shaped spots with grey or dark brown margin appear on the leaf and leaf sheath. Controls:- Treat the seed at the rate of 10kg seed with 5gm Emisan. Grow resistant variety and Use Seaweed Extract Liquid

Bacterial Leaf Blight Casual organism:- Xanthomonas oryzae Symptoms:- The ‘Kresek’ occurs in early stage of plant growth in which the plant withers and dries up. In the later stage, the blighting starts from the tip of the leaves from one or both the margins or in the centre and proceeds downwards. Controls: - Use certified seed from a reliable source or treat the seed 1gm Streptocyclin. Grow resistant variety and Use Seaweed Extract Liquid

Sheath Blight Casual organism: - Corticium sasakii Symptoms: - The symptoms of diseases appear on leaf and leaf sheath as 2-3 cm long greenish –grey lesions, turning to straw colour and surrounded by bluish grey narrow bands. Control Don’t use heavy dose of nitrogen. Spray the crop with 1kg Carbendazim per hectare in 1000 litres of water. Grow resistant variety and Use Seaweed Extract Liquid

Insect – pest and management Insect – pest and management Stem Borer: - Damage caused by the larva of this insect results in ‘Dead heart’ and ‘White head’. ‘Dead heart’ is created in early life of the plant before flowering and ‘White head’ occurs at flowering resulting in drying of the entire panicle. Controls: - –Apply 3% carbofuran granules at the rate of 30-33kg/ha. Grow resistant variety and Use Seaweed Extract Liquid

Leaf Roller Caterpillars of this pest cause damage by folding the leaf blades into tubular structure and feeding on the green leaf tissues with in this structures. Control: Apply Parathion 2% dust at the rate of 20kg/ha. Other insect-pest is Gundhi Bug, Rice Hispa, Brown Plant Hopper etc Grow resistant variety and Use Seaweed Extract Liquid

Harvesting and threshing The right stage for harvesting is when about 80% panicles have about 80% ripened spikelets. The grain will contain about 20% moisture. The most common method of threshing are trampling by bullocks, rubbing with bare human feed ( in hills) or lifting the bundles and striking them on the raised wooden platform.

Yield A well manage crop of mid-late duration ( days) paddy, yields about quintals paddy per hectare. Short duration varieties yield about quintals of paddy per hectare. Hybrid rice yields, about quintals of paddy per hectare Apply Seaweed Extract Liquid for increasing the yield by 30% instead of Fertilizers.

Major problems in rice cultivation Major problems in rice cultivation About 78% of the farmers are small and marginal in the country and they a re poor in resource. The problems of flash floods, water logging/ submergence due to poor drainage are very common in East India. Continuous use of traditional varieties due to the non-availability of seeds and farmers lack of awareness about high yielding varieties. Low soil fertility due to soil erosion resulting in loss of plant nutrients and moisture.

Low and imbalanced use of fertilizers, low use efficiency of applied fertilizers particularly in the North-Eastern and Eastern States. The Eastern region experiences high rainfall and severe flood almost every year which lead to heavy loss. Heavy infestation of weeds and insects/pests. Delay in monsoon onset often results in delayed and prolong transplanting and sub-optimum plant population (Mostly in rainfed lowlands). In the years of scanty or adverse distribution of rainfall, the crop fails owing to drought etc

Strategies may be adopted to increase the productivity of Rice Emphasis may be given on a cropping system approach rather than a single crop development approach.. system development Propagation of location specific crop production technologies in different agro- climatic zones.technologies Improving soil fertility Grow resistant variety Use Seaweed Extract Liquid

Replacement of low potential/pest susceptible old varieties by new high yielding varieties with promising yield potential. To encourage cultivation of hybrid rice through demonstrations and making seed available to the farmers. Motivating the farmers to provide life saving irrigation to the crop wherever possible during long dry spells. Grow resistant variety and Use Seaweed Extract Liquid Strategies may be adopted to increase the productivity of Rice

Thanking You G. Rajaretnam Managing Partner Kunnam Granite Works Mobile: