Intensify the management of fertilizer and water in the middle and later stages of rice and promote transformation of rice

At present, the province's rice has entered the critical stage of scramble, sturdiness, and spikes. Affected by the delay in planting time, the overall situation of rice seedlings in the province is not ideal. The number of stems per mu is generally 20,000 to 30,000 less than the same period of last year, and the leaf age is 0.5 to 1.5 times slower. At the same time, due to the diversification of the planting methods, the development of rice seedlings is unbalanced. According to the provincial planting system, July 25 seedling statistics, hand-planted rice, throwing rice leaf age were 11 to 13 leaves, 11 to 12 leaves, and the number of stems per mu was 200,000 to 250,000 and 220,000 respectively. 270,000; the machine inserted 9-11 leaves of rice leaves, and the number of stems per mu is from 220,000 to 310,000. Some of the older hand-planted rice plants were planted slowly due to the delay of the field, and the population was too large. Some of the late-planting machines were planted with rice. Due to the excessive planting time, the young planters did not grow and the population was insufficient. Direct-seeded rice leaf age 7 to 9 leaves, 200,000 to 400,000 stems per mu. At present, it is necessary to strengthen the management of paddy fields' water and fertilizer and prevent diseases and insect pests, and lay a good foundation for building high-yield groups.
1. Scientific management of water and improvement of the quality of the group will be based on the principles of “maturity to unequal time, and time to seedling”. There was much rain in the previous stage, and the effect of the field was poor. For the plots that have exceeded the number of panicles, they should immediately open the land and put aside the fields, and properly reposition them. The control groups should be further increased. For the fields that are already sufficiently seedlings and will be sufficient for seedlings, take measures to put it aside; Some plots with late stemming, late planting, late planting, etc., need to put a field in order to shake the tiller and form a panicle, and increase the percentage of spikes; for fields with late planting or serious diseases and pests, Increase the application of urea 3 to 5 kg, and apply zinc fertilizer, potash fertilizer, etc., the implementation of a light field with fat, and promote the transformation of the seedlings. The degree of holding up the fields is not sure when Tanabe is not white. When Tanaka has a small amount of fine fissures, Sheung Shui goes to dry, so it goes back and forth, step by step, and finally reaches the standard of burying the soil, not setting foot in the middle of the field, the paleness of the leaves, and the straightness of the leaves. In view of the large area of ​​straw returned to the farm this year, water slurry management in the middle and later stages should prevent the group rebound and soil resilience after rewatering. Except for the establishment of water layers during the booting stage and heading and flowering stage, the remaining stages are mainly alternating wet and dry and intermittent irrigation. Until the water is cut off about one week before harvest, we can't cut off the water prematurely. Advocate appropriate harvesting to prevent premature harvesting from affecting harvest.
2. Due to grain fertilizer applied to seedlings, large spikes and multiple grains are based on the progress of fertility. According to the condition of rice seedlings and the paleness of leaf color, ear and grain fertilizers are applied in a timely manner. The amount of panicle fertilizer, japonica rice generally accounted for 20% to 30% of total nitrogen application, japonica rice accounted for 40% to 50% of total nitrogen application. In moderately populated plots, hybrid medium japonica rice and mid-maturity japonica rice were mainly cultivated with flowering fertilizer. Hybrid mid japonica rice was applied at a leafage residue of 1 to 1.5 and urea was applied at 4 to 5 kg per mu. When the remainder is between 2 and 2.5, apply 5 to 7.5 kg of urea per acre. Late-maturing medium-early rice and early-maturing late-season rice should be promoted and ensured, and flower-fertilizer should be applied when the rest of the leaf age is 3 to 3.5. The content of compound fertilizer is 15 kg and urea is 5 kg. The preserved fertilizer is applied when the remainder of leaf age is 1 and the application of urea is 5 to 7.5 kg per mu. Insufficient populations should apply early and heavy panicle fertilizers. The hybrid middle japonica rice should be applied at 1.5 to 2 leaves and apply urea 7.5 kg per mu to promote compatibility. Late maturing japonica rice and early maturing japonica rice should be used. Promote the method of fertilization, promote flower fertilization when the rest of the leaf age is 4 and apply 15 kg of compound fertilizer per acre, 10 kg of urea, and apply fertilizers as appropriate. When the remainder of the leaf age is 1, apply 5 kg of urea per acre. In groups where the population is prosperous, the application of panicle fertilizer can delay the age of one leaf, and reduce the amount of fertilizers appropriately. It is also possible to adopt the method of supplementing the panicle fertilizer, that is, applying a small amount of panicle fertilizer every time the flag leaf extracts and the leaf color fades. Mushi urea 5 ~ 7.5 kg, such as leaf extraction leaf color is still not faded, it does not pan ear fertilizer, can make up the application of grain fertilizer in the break period. For the field where straw is returned to the field and the amount of nitrogen fertilizer is used earlier, the amount of panicle fertilizer should be appropriately reduced at the later stage. In addition, spraying rice foliar fertilizer should be paid attention during rice grain filling period, and the photosynthetic capacity of leaves should be extended and increased.
3. Strengthen the prevention and control of pests and diseases We pay attention to the occurrence and harm of pests and diseases in the middle and later stages, such as rice leaf roller, white-backed planthopper, brown planthopper, sheath blight, and rice blast disease, and timely carry out prevention and control. At present, the height of weedy rice plants is slightly higher than that of cultivated rice, the leaves are slender, and the leaf color is light, which is easy to identify in the field and should be removed manually to reduce harm.

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