Fertilization method for early earing of super late sowing wheat in northern Jiangsu

Abstract

The invention discloses a fertilizing method for early head sprouting super-late-sowing wheat in the northern Jiangsu area. The wheat is sowed in December, or January, or February; the fertilizing amount and the control are characterized by (1) applying enough phosphorus potassium fertilizer and appropriate amount of nitrogen fertilizer as a base fertilizer, and avoiding using urea; (2) forcedly suppressing and raising humidity after sowing; (3) avoiding applying a seedling fertilizer before a stem grows to 2.5 leaves; (4) dressing a turning-green nitrogen fertilizer before transplanting and a fertilizer for elongation and booting due to seedlings and snow and rain. According to the fertilizing method provided by the invention, through controlling and reducing the usage of the nitrogen fertilizer in a base seedling fertilizer, and avoiding using the urea, the total leaf number of the stem of the super-late-sowing wheat in the northern Jiangsu area is reduced to 8 to 9 pieces, a full heading stage is early to before May 1st, and the defects that the total leaf number of the stem is 10 to 14 pieces, and the full heading stage ranges from May 5th to May 20th due to excessive usage of the nitrogen fertilizer in the base seedling fertilizer especially excessive usage of the urea in the prior art are overcome.

Description

technical field [0001] The invention relates to the technical field of farming and cultivation, in particular to a fertilization method for early earing of ultra-late-sowed wheat (that is, sown in December, January and February) in northern Jiangsu. Background technique [0002] In northern Jiangsu, the number of days with daily minimum temperatures below -5°C and -10°C is 21.9 days and 2.2 days respectively. The average monthly temperatures in December, January, and February are 3.6°C, 1.3°C, and 3.5°C respectively. 850~980mm, but in winter (December to February of the following year), the rainfall is only 60~70mm, the groundwater depth in winter is 1.0~2.0m, the soil layer is deep and the soil capillary has a strong upward water transport capacity. Wheat is sown at the right time in northern Jiangsu (sowed on October 10-15). At the beginning of winter, the main stem and leaf age are 6-7 leaves, and a single plant has 2-4 tillers. Count 13~14. [0003] In recent years, as...

AI Technical Summary

Problems solved by technology

[0004] At present, the existing fertilization technology for ultra-late sowing wheat in this area is derived from following or transforming the fertilization technology for sowing wheat at the right time. The wheat sown in December, January and February has not yet emerged or been sown at the beginning of winter, and the wheat sown at the right time is used. The fertilization technique will result in a total number of leaves of 10-14 on the main stem. Because the heading date of wheat is delayed with the increase of the total number of leaves on the main stem, it will be postponed until May 5-20 to complete the earing, which cannot meet the requirements of super-late-sowed wheat. The prerequisite for high yield—the grouting time must be more than 30 days, so it often results in a yield of less than 300 kg / mu or even a complete loss of harvest

Trace it to its cause and main defect is: (1) base fertilizer effect is poor

In the existing fertilization technology of ultra-late sowing wheat, the amount of nitrogen applied to base seedling fertilizer is too much, and the amount of nitrogen applied to jointing and booting fertilizer is insufficient, which deviates from the fertilization goals of strong seedling antifreeze, early heading, high yield and high efficiency, resulting in high seedling peak, late heading, The panicle shape is small and the grain weight is low, which leads to low yield and poor profit. At the same time, there is a severe contradiction between nitrogen capture between the growth of wheat in the middle and late stages and the decomposition of rice straw returning to the field.

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