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Cultivation method for reducing morbidity of sclerotinia rot of rape in paddy field

The technology of rape sclerotinia and cultivation method is applied in the field of cultivation for reducing the incidence of sclerotinia sclerotiorum in paddy fields, and can solve the problems of unreasonable cultivation measures, aggravating sclerotinia sclerotinia, etc. Production, the effect of reducing morbidity

Inactive Publication Date: 2017-09-19
HUAZHONG AGRI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Third, unreasonable cultivation measures can aggravate the occurrence of Sclerotinia
Although this technical solution combines conventional methods, it does not provide a corresponding technical solution for the relationship between rice-oil rotation mode, fertilizer operation, planting density or lodging angle, etc., and the occurrence of rape sclerotinia

Method used

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  • Cultivation method for reducing morbidity of sclerotinia rot of rape in paddy field
  • Cultivation method for reducing morbidity of sclerotinia rot of rape in paddy field
  • Cultivation method for reducing morbidity of sclerotinia rot of rape in paddy field

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] In 2014-2015 and 2015-2016, the incidence rate test of different rape varieties was carried out at Huazhong Agricultural University in Wuhan City, Hubei Province for two consecutive years. The specific steps are as follows:

[0042]1) Test material: The previous stubble of the test site is rice, harvested in early September. The cell is 10m long and 2m wide. A total of 20 varieties were tested in the upper, middle and lower reaches of the Yangtze River, as follows: 6 varieties in the upper reaches of the Yangtze River: Yunyou Shuang No. 2, Yunyouza No. 10, Chuanza NH5118, Rongyou No. 8, Rongyou No. 18, Chuanza You 36; 12 in the middle reaches of the Yangtze River: Xiangyouza 553, Xiangyouza 518, Ganyouza 7, Ganyouza 8, Huaza 62, Huaza 9, Zhongshuang 11, Sunshine 2009; Lower Yangtze River 6 A: Ningza 27, Ningza 1818, Suyou No. 8, Suyou No. 6, Yanyouza No. 3, and Yangyou No. 9.

[0043] 2) Field management of rapeseed: the density is set at 30,000 plants / mu, the row spa...

Embodiment 2

[0048] In 2014-2015 and 2015-2016, different nitrogen, phosphorus and potassium application rates were tested at Huazhong Agricultural University in Wuhan City, Hubei Province for two consecutive years. The specific steps are as follows:

[0049] 1) Test material: The previous stubble of the test site is rice, harvested in early September. The plot is 10m long and 2m wide, and the variety is Huayouza 62.

[0050] 2) Test method: set up single-factor experiments with different nitrogen, phosphorus, and potassium fertilizers; set nitrogen fertilizer to 0kg·hm –2 (N0), 180kg·hm –2 (N180), 360kg·hm –2 (N360) 3 levels, phosphate fertilizer setting 0kg hm –2 (P0), 120kg·hm –2 (P120), 240kg·hm –2 (P240) 3 levels, potash fertilizer setting 0kg hm –2 (K0), 150kg·hm –2 (K150), 300kg·hm –2 (K300) 3 levels; experiment set up with three repetitions. 50% nitrogen fertilizer and all potassium fertilizer, phosphorus fertilizer, boron fertilizer (13.5kg·hm –2 ) is used as base fertil...

Embodiment 3

[0059] In 2014-2015 and 2015-2016, different nitrogen fertilizer base follow-up tests were carried out at Huazhong Agricultural University in Wuhan City, Hubei Province for two consecutive years. The specific steps are as follows:

[0060] 1) Test material: The previous stubble of the test site is rice, harvested in early September. The length of the plot is 10m, the width is 2m, and the variety is Huaza 62.

[0061] 2) Test method: adopt split-plot design, set 3 nitrogen application rates (12kg / mu, 18kg / mu, 24kg / mu) as main plots, use urea containing N 46% as nitrogen source, and nitrogen fertilizer application amount per level Set three different basal topdressing ratios (6.5:3.5, 5:5, 3.5:6.5) as subplots, and topdressing time is the sprouting stage (the sprouting height is 5cm). Repeat three times.

[0062] 3) Field management of rapeseed: after the rapeseed emerges, thin out the cluster seedlings, and set the seedlings at the 3-4 leaf stage, and the basic seedlings are ...

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Abstract

The invention belongs to the technical field of high-yield cultivation, and particularly relates to a cultivation method for the reducing morbidity of sclerotinia rot of rape in a paddy field. The cultivation method for the reducing morbidity of sclerotinia rot of rape in a paddy field includes the steps that water is drained, the field is aired, ditching is conducted and ridges are made, wherein about ten days before rice harvesting, water draining and field airing are conducted, and the ridges are made after the rice is harvested; breeds with relatively strong resistance are selected, sclerotia are sieved to be removed before seeding, and meanwhile abortive grains and the sclerotia are removed; scientific fertilization is conducted, the dosage of nitrogenous fertilizer and the dosage of phosphatic fertilizer are reduced, the dosage of potassic fertilizer is increased, 180-240 kg*hm<-2> of the nitrogenous fertilizer, 110-130 kg*hm<-2> of the phosphatic fertilizer and 110-130 kg*hm<-2> of the potassic fertilizer are applied, the phosphatic fertilizer and the potassic fertilizer are applied as basic fertilizer, and the nitrogenous fertilizer is applied as the basic fertilizer and shooting fertilizer, wherein the ration of the basic fertilizer to the shooting fertilizer is 6.5:3.5; the planting density is increased from 150-300 thousand plants per hm<2> to 450-600 thousand plants per hm<2>. After the cultivate method for reducing the morbidity of sclerotinia rot of rape in a paddy field is adopted, under the conditions suitable for a seeding period, by reducing the dosage of nitrogenous fertilizer, increasing the density, applying the nitrogenous fertilizer in advance, controlling the dosage of the phosphatic fertilizer and increasing the dosage of the potassic fertilizer, the disease resistance and lodging resistance of rape stems are effectively improved, ventilation and light-transmission conditions are improved, the morbidity of the sclerotiniose is reduced, the production benefits of rapes are obviously improved, and green and efficient production is achieved.

Description

technical field [0001] The invention belongs to the technical field of high-yield cultivation of crops, and in particular relates to a cultivation method for reducing the incidence of rapeseed sclerotinia in paddy fields. Background technique [0002] Rapeseed (Brassica nanups L.) is one of the important oil crops in my country, and its planting area and total output account for more than 30% of the world's rapeseed area and total output. Rapeseed oil is also the largest edible vegetable oil produced in my country, with an annual production of about 4.50×10 6 t, accounting for more than 41% of the total domestic edible vegetable oil. Rapeseed sclerotinia, also known as "soft rot" and "stem rot", is commonly known as empty stalk and mildew. It is a disease caused by the infection of Sclerotinia sclerotiorum (Lib.) de Bary, which is harmful to rape production. The main diseases of rapeseed occur in rape planting areas, and can occur from seedling stage to near maturity, but ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G1/00A01C21/00
CPCA01C21/00
Inventor 李小勇蒯婕周广生
Owner HUAZHONG AGRI UNIV
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