High-yield and high-efficiency fertilization methods for rain-fed rice stubble wheat in northern Jiangsu

Abstract

The invention discloses a high yield and high efficiency fertilizing method for rain-fed wheat in rice stubble in the northern Jiangsu area. The method specifically comprises the following steps of: (1) additionally applying a phosphorus and potassium base fertilizer, wherein urea of the base fertilizer is reduced in dosage while the date of seeding is postponed; (2) strictly controlling a striking root fertilizer, and applying a jointing fertilizer due to seedlings and rain; and (3) generally applying and heavily applying a booting fertilizer, determining whether a flower raising fertilizer is applied according to the number of spikelets which do not bloom, and taking good fecundity of the spikelets of the ears of wheat, three green leaves obtained by heading a single stem in 25 days as a testing index whether the reviving jointing fertilizer is reasonable or not and the booting fertilizer is sufficient or not. The invention provides the fertilizing method with limiting conditions such as the date of seeding of the rain-fed wheat in rice stubble in the northern Jiangsu area is late, the seeding is slow to emerge, the rice straws are returned in full dose, surface soil moisture content in autumn and winter is relatively poor, the rice is hard to irrigate, and the fertilizer-retaining ability of the soil is poor. The method has the major effects of being large in spike, full in grain and high in yield and overcomes the defects that in the prior art, the base fertilizer has more striking root fertilizer and jointing fertilizer and the booting fertilizer is severely insufficient.

Description

technical field [0001] The invention relates to the technical field of farming and cultivation, in particular to a fertilization method for rain-fed rice stubble wheat in the northern Jiangsu area. Background technique [0002] The climate and soil characteristics in northern Jiangsu are that the annual frost-free period is about 220 days, the annual average temperature is 14.0-14.4°C, the active accumulated temperature above 0°C is 4600-4700°C, the average temperature in January (the coldest month of the year) is 0-1.5°C, and the daily minimum The number of days with temperature ≤-5°C and ≤-10°C is 21.9 days and 2.2 days respectively. The annual rainfall is 830-985 mm but concentrated in summer. The rainfall from October to February of the following year is only 135-165 mm, and the depth of groundwater is 1.0-2.0 mm. m, the soil types are mainly fluvo-aquic soil, sandy black soil, and yellow-brown soil, the soil fertility is generally low, and the organic matter content is ...

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved in the present invention is for the limited conditions such as rain-fed rice stubble wheat sowing date late seedling emergence in northern Jiangsu area, autumn and winter surface moisture is poor, soil fertilizer supply and fertilizer retention capacity is poor and the prior art basal tiller fertilizer is excessive but booting The various disadvantages of serious shortage of fertilizers lead to the difficulty of growing seedlings and severe frost damage due to loose topsoil and lack of moisture before winter; excessive growth of green fertilizers in spring often results in vigorous growth, excessive peak seedlings, and cold damage in late spring; In the current situation of premature aging and small spikes and light grains due to premature and late loss of strength, a high-yield and efficient fertilization method for rain-fed rice stubble and wheat in northern Jiangsu is provided. Combined with field inspection standards, reasonable fertilization is used to focus on large spikes and high grains to achieve high yields and increase efficiency. , the purpose of saving fat