Protecting stems and leaves from premature senescence, enhancing the photosynthetic efficiency after heading of rice plants, and promoting high accumulation and high translocation are one of the key measures to achieve high yield and quality of mid-season hybrid rice.
1, make-up application of fertilizer. After the heading of hybrid mid-season rice, the functional leaves are gradually withered. If the fertilizer is deferred, the leaves will die prematurely and the ability of photosynthesis of rice plants will be weakened. Therefore, increasing fertilizer sources, prolonging leaf lifespan, and increasing photosynthetic capacity of leaves are one of the effective measures to promote graininess and plumpness. The application of granule fertilizer is generally based on foliar spraying of the foliar spray, spraying 2-3 times during the breakage period to the grain filling stage, and using 100g of potassium dihydrogen phosphate and 0.5-1 kg of urea per acre, with 50 After dissolving kilograms of water, add 15-20 ml of 802 mixture to spray on the stems and leaves of rice plants. For the deficiency of the base fertilizer, the denitrification of the leaves is earlier than the yellow crop, and 2.5-4 kilograms of urea should be taken before the heading for each mu. Promote the further differentiation of flower buds and prevent the degradation of spikelets, and play the big spike advantage of hybrid rice.
2, adjust the moisture. The heading and flowering period of hybrid mid-season rice has strict requirements on water, and the heading and flowering stage is most vulnerable to high temperature hazards. It is advisable to properly deepen the irrigation, increase the humidity in the field, reduce the temperature, and promote the orderly and normal flowering and pollination. In case of abnormal high temperature weather, clean water should be sprayed to improve the microclimate of the ear layer and reduce the impact. After heading, the plant roots are senescent, and the soil should be ventilated under the condition of ensuring the water supply, so that the roots can be bred and the roots can be protected to prevent the roots from failing. In the initial period from heading to pollination, maintain a certain water layer in the field to meet the physiological water requirement of the plant. Afterwards, wet irrigation should be maintained. The water should be treated according to the principle of alternating wet and dry, the filling period should be mainly wet, and the wax ripening period should be dry. Lord, dry and wet alternately mature. Do not cut off water too early, otherwise it will artificially lead to premature aging, resulting in reduced production and reduced rice quality. Generally, it is advisable to cut off water for about 5 days before harvest.
3, control pests. The serious harm of pests and diseases in the later stage of hybrid mid-season rice is an important factor influencing the “secure storageâ€, “strong source†and “smooth flowâ€, and it is an obstacle to seize high yield and high quality. It must be prevented and treated in time to protect the stems and leaves from harm. The pests and diseases that destroy leaf of hybrid rice include late-stage syndrome, rice blast, bacterial leaf blight, and rice leaffolder. The diseases and insect pests that damage the culm include sheath blight, rice planthopper and aphid. It is necessary to focus on the prevention and control of late-stage complications because it is the result of the combination of various fungal diseases. It often causes leaf scorch, broken leaves, and premature aging, which can reduce rice growth by about 20%. We must pay close attention to prevention. In the break period, use 40% of dry fertilizer or 50-75 grams of leaf green wettable powder per acre, add 50 kg of water and spread evenly on the stems and leaves of rice plants, which can receive significant protection against disease and leaves and prevent The effect of premature aging. For the common areas of rice blast disease and the bacterial blight disease epidemic areas, in order to prevent the disease, we can add tricyclazole and ebuprofen, etc., and their counterparts to spray at the breaching stage.
4, spray boron fertilizer. During the flowering and fruiting stage of hybrid rice, the supply of boron is sufficient, which can increase the seed-setting rate and increase the grain weight. According to the experiment, the application rate of boron fertilizer in the middle stage of hybrid mid-season rice can increase the seed setting rate by 4.3% and increase the grain weight by 0.5-1 g. Therefore, in the absence of boron or rapeseed paddy fields, they should be sprayed once at the heading stage and at the full heading stage. They can be used in combination with sprayed granular fertilizers, each with 100 grams of borax or 100 grams of photosynthetic fertilizer. , add 50 kg of water diluted evenly sprayed. When preparing the borax solution, first use a small amount of warm water to fully dissolve the borax, and spray it in time after mixing.
1, make-up application of fertilizer. After the heading of hybrid mid-season rice, the functional leaves are gradually withered. If the fertilizer is deferred, the leaves will die prematurely and the ability of photosynthesis of rice plants will be weakened. Therefore, increasing fertilizer sources, prolonging leaf lifespan, and increasing photosynthetic capacity of leaves are one of the effective measures to promote graininess and plumpness. The application of granule fertilizer is generally based on foliar spraying of the foliar spray, spraying 2-3 times during the breakage period to the grain filling stage, and using 100g of potassium dihydrogen phosphate and 0.5-1 kg of urea per acre, with 50 After dissolving kilograms of water, add 15-20 ml of 802 mixture to spray on the stems and leaves of rice plants. For the deficiency of the base fertilizer, the denitrification of the leaves is earlier than the yellow crop, and 2.5-4 kilograms of urea should be taken before the heading for each mu. Promote the further differentiation of flower buds and prevent the degradation of spikelets, and play the big spike advantage of hybrid rice.
2, adjust the moisture. The heading and flowering period of hybrid mid-season rice has strict requirements on water, and the heading and flowering stage is most vulnerable to high temperature hazards. It is advisable to properly deepen the irrigation, increase the humidity in the field, reduce the temperature, and promote the orderly and normal flowering and pollination. In case of abnormal high temperature weather, clean water should be sprayed to improve the microclimate of the ear layer and reduce the impact. After heading, the plant roots are senescent, and the soil should be ventilated under the condition of ensuring the water supply, so that the roots can be bred and the roots can be protected to prevent the roots from failing. In the initial period from heading to pollination, maintain a certain water layer in the field to meet the physiological water requirement of the plant. Afterwards, wet irrigation should be maintained. The water should be treated according to the principle of alternating wet and dry, the filling period should be mainly wet, and the wax ripening period should be dry. Lord, dry and wet alternately mature. Do not cut off water too early, otherwise it will artificially lead to premature aging, resulting in reduced production and reduced rice quality. Generally, it is advisable to cut off water for about 5 days before harvest.
3, control pests. The serious harm of pests and diseases in the later stage of hybrid mid-season rice is an important factor influencing the “secure storageâ€, “strong source†and “smooth flowâ€, and it is an obstacle to seize high yield and high quality. It must be prevented and treated in time to protect the stems and leaves from harm. The pests and diseases that destroy leaf of hybrid rice include late-stage syndrome, rice blast, bacterial leaf blight, and rice leaffolder. The diseases and insect pests that damage the culm include sheath blight, rice planthopper and aphid. It is necessary to focus on the prevention and control of late-stage complications because it is the result of the combination of various fungal diseases. It often causes leaf scorch, broken leaves, and premature aging, which can reduce rice growth by about 20%. We must pay close attention to prevention. In the break period, use 40% of dry fertilizer or 50-75 grams of leaf green wettable powder per acre, add 50 kg of water and spread evenly on the stems and leaves of rice plants, which can receive significant protection against disease and leaves and prevent The effect of premature aging. For the common areas of rice blast disease and the bacterial blight disease epidemic areas, in order to prevent the disease, we can add tricyclazole and ebuprofen, etc., and their counterparts to spray at the breaching stage.
4, spray boron fertilizer. During the flowering and fruiting stage of hybrid rice, the supply of boron is sufficient, which can increase the seed-setting rate and increase the grain weight. According to the experiment, the application rate of boron fertilizer in the middle stage of hybrid mid-season rice can increase the seed setting rate by 4.3% and increase the grain weight by 0.5-1 g. Therefore, in the absence of boron or rapeseed paddy fields, they should be sprayed once at the heading stage and at the full heading stage. They can be used in combination with sprayed granular fertilizers, each with 100 grams of borax or 100 grams of photosynthetic fertilizer. , add 50 kg of water diluted evenly sprayed. When preparing the borax solution, first use a small amount of warm water to fully dissolve the borax, and spray it in time after mixing.
Fertigation is using your irrigator to fertilise the plants and soils as you water, which is the most efficient and advanced practice of fertilization. Aid of pressure system (or natural divide terrain), the soluble solid or liquid fertilizer, according to the soil nutrient content and crop fertilizer regularity and characteristics of species, with the fat of with irrigation water, through a controlled water supply pipeline system, supplying, the compatibility, water through the pipe and drop head form drip irrigation, uniform, regular, quantitative, infiltration area crop root growth and development, make the main root soil always stay loose and appropriate moisture content, at the same time according to different crop fertilizer characteristics, environment and soil nutrient content in soil; Crops in different growth phase water requirement, the different development stages of the fertilizer rule is the demand of design, the water and nutrient timing quantitative, provided directly in proportion to the crops.
Greenhouse Drip Irrigation System
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