At present, wheat and rapeseed in our province have gradually entered the returning green period and convulsions period, formally promoted the critical period of transformation and upgrading at seedling stage, construction of reasonable groups, and establishment of high-yield shelves. Grasping drought protection seedlings and field management in the spring are urgently needed.
Classification guidance, scientific drought-resistant seedlings Huaibei area drought has not eased the plots, we must continue to do a good job of drought-resistant watering work. The 0 to 10 cm relative soil moisture content of 55% or less, the total number of wheat stalks in the population, should be controlled in the "cold tail warmer", when the night when the freezing and sloping early to adopt sprinkler irrigation or ditch irrigation water drought, irrigation per acre 50 cubic meters, in order to complete all the seepage before the evening temperature, the ground is not suitable for water.
Increase the use of relays to promote long-term fertilizer, promote long-rooted due to late sowing drought caused seedlings weak seedlings, lack of seedlings broken ridge fields, need to dampen (rain, snow or irrigation) per mu increase relay to promote long-term fertilizer 5 ~ 7.5 kg urea To promote the restoration of growth. One type and two types of seedlings should not be returned to green manure, which will allow space for the re-introduction of Pusht's joint booting fertilizer to prevent excessive spring births, worsening of the population and late lodging. For a few Wangchangtian blocks, plant growth regulators and compounding control agents such as chlormequat, paclobutrazol, etc., should be applied before jointing (preferably before the start of erection) to shorten the first internode length and enhance Plant lodging ability.
The ploughing and ploughing in the ridge tillage is affected by the drought, and the secondary roots of some buckwheat cultivars are short and few, and the absorption capacity is poor. After the watering, the soil compaction is easily caused, which further affects the absorption of nutrients by the roots, and the cultivator should be cultivated as soon as possible after the surface is whitened. Scratching, can be combined with fertilization. After the freeze-thaw alternation and rain and snow erosion in rice fields, the field trenches are prone to collapse and clogging. The dredging and dredging work must be done as soon as possible, and the high standard must be matched with a set of ditch in the field to ensure the “three-channel†support and ditch Connect, can irrigation can row.
Do a good job of removing the spring and prevent Rhizoctonia solani on the timely removal of weeds to the standard field. The removal time should be carried out before the jointing stage. The daily average temperature of the “cold tail warmer†should be stable at 5°C or above. Do not use the drug at temperatures below 0°C in the 7 days after administration. Effectiveness to avoid phytotoxicity. In order to use broad-leaved weeds such as pigweed, broadleaf, big-necked vegetables, and leeks, the use of 20% chlorofluoroacetic acid 50ml or 75% tribenuron-methyl dispersible granules per acre prevents 1.5g Single and double cotyledons mixed field, in the weeds before and after the 3-leaf period with 6.9% perchlorate oxazolysazin spirit emulsion 50 ml plus 20% chlorfluoxacin 50 ml control. To control grass weeds in rapeseed field, we can use high-efficiency flupirtine and fluazifop and other drugs; control broad-leaved weeds such as swine crickets and cattle, and use herbicides and other drugs, or combination Spring cultivators were manually removed. In the early stage of jointing wheat, the crops with a rate of 20% of sheath blight strains were promptly treated with Jinggangmycin, oxazol, tebuconazole and other drugs, and a large amount of crude spray was used to improve the control effect.
Push reapplied wheat jointing panicle and rapeseed cultivars. The absorption of nitrogen, phosphorus, and potassium by plants after turning greens accounted for about 60% to 70% of their total lifetime absorption. Soil fertility is difficult to meet the needs of plants to absorb nutrients. Pusch reapplied wheat jointing booting and rapeseed fertilizer. The wheat jointing fertilizer is applied in the inverted 3 leaf stage, the color of the leaf is faded, the height of the peak seedlings is decreased, the basic internodes of the base fertilizer are basically fixed in length, and the second internodes are started to elongate. The weak seedlings in the group are used in advance and the groups are large. Wang Miaotian of the appropriate postponed application. Huainan region is used in the middle and early March and Huaibei region in the middle and late March. The amount of fertilizer is 20% to 25% of total nitrogen, 35% to 50% of total phosphorus, and 50% of total potassium, ie, per acre. Pure nitrogen 4 to 5 kilograms, phosphorus pentoxide 3 to 4 kilograms, potassium oxide 5 to 6 kilograms, to apply compound fertilizer home urea or special formula fertilizer is appropriate. In high-yielding fields and middle-strength wheat fields, second-handed panicle fertilizer was applied from the tip of the flag leaf to the time of breaking. The amount of nitrogen used accounted for 15% of the total nitrogen, that is, 2.5 to 3.5 kg of pure nitrogen per acre, and the type of fertilizer was urea. should. The strong gluten wheat along the coast of Yangtze River should follow the fertilization principle of “advance of nitrogen controlâ€. It is necessary to use one-time application of joint fertilizer in the inverted three-leaf stage, and not to recommend the application of panicle fertilizer to ensure the quality of strong gluten.
The normally growing high-yield rapeseed field is re-applied to manure when the leaves begin to yellow and grow 25 to 30 centimeters high. Fertilizer accounts for 30% to 35% of the total nitrogen application rate, and the total potassium application rate is 50%, ie per acre. 5.5 ~ 7.5 kg of nitrogen, 3.5 ~ 4.5 kg of potassium oxide, rape in the initial stage of pure nitrogen supplement 2 kg per acre to prevent premature aging plants. Most of the overwintering period lacked sufficient growth and applied a rapeseed field in early spring. After the convulsions, the second crop was applied as appropriate. The total amount of nitrogen applied to the two stubbles accounted for 35% to 40% of the total nitrogen applied. In the field where no boron fertilizer or boron deficiency was applied in the previous period, quick-acting boron fertilizer or borax should be added to prevent “flowering but not realizingâ€.
Preplans in advance to prevent the spring freezing temperatures, the temperature is very unstable in spring, cold and easy to change rapidly, after the jointing of wheat and rape after the encounter -4 ~ -1 °C low temperature, and last 6 to 7 hours, it may lead to wheat ear freezing or After the spikes are frozen, they become abnormal spikes and the stems and stems of rapeseed are broken. Take timely measures to remedy them. In the case of cold weather, the degree of freezing of young ears was investigated on a daily basis 2 to 3 days after the low temperature. The wheat field with a frost death rate of over 10% was returned to fertilizer in time. Generally, the rate of freezing in 10% to 30% of the wheat field can apply 5 kg of urea per acre, and the percentage of frozen wheat growing in the field exceeding 30% of frost rate is increased by 10% per acre and the application of urea is 2 to 3 kg, with a maximum of 15 kg. Strive to shake the childbirth and high-grade birthing, and reduce production loss. Rape buds during the period of frost-cold winter cold, visible seedling growth potential appropriate application of 5 kg of urea as a recovery fertilizer. The initial flowering period can be combined with the control of Sclerotinia sclerotiorum to spray mixed fertilizers and fertilizers to promote the growth and enlargement of pods.
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