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Cultivation method of regulating and controlling rice field nitrogen fertilizer slow release by means of azolla imbricata combined application

A cultivation method and technology of green grass, applied in the directions of fertilization method, cultivation, plant cultivation, etc., can solve problems such as the death of green grass

Active Publication Date: 2017-06-20
CHINA NAT RICE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the other hand, the growth of Ophelia is very sensitive to water, and mild drought stress can lead to the death of a large area of ​​Ophelia

Method used

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  • Cultivation method of regulating and controlling rice field nitrogen fertilizer slow release by means of azolla imbricata combined application
  • Cultivation method of regulating and controlling rice field nitrogen fertilizer slow release by means of azolla imbricata combined application

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Experimental program
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Effect test

Embodiment 1

[0022] Embodiment 1: A kind of cultivation method of regulating and controlling the slow release of nitrogen fertilizer in paddy fields by using the combined application of P. chinensis

[0023] Varieties and fertilizer dosages are selected according to local conditions; conventional varieties of Olivia spp. ( Azolla filiculoides Lamk ).

[0024] 1) Seedling field stage

[0025] a. Rice seed treatment: Before soaking the seeds, choose a sunny day to dry the seeds for 1-2 days, which can improve the germination rate and germination uniformity. When drying the seeds, pay attention to preventing the seeds from being damaged by high temperature in hot days. Soak for 48 hours, rinse with clean water after soaking, accelerate germination until the root grows a grain, and the bud grows half a grain before sowing.

[0026] b Cultivation of fine green duckweed: Utilize the existing paddy fields to store water for stocking, the water source is sufficient, and the water layer is rel...

Embodiment 2

[0033] Embodiment 2: field test

[0034] The test was carried out in the test field of the China Rice Research Institute in 2016. The tested variety Jia 58; nitrogen fertilizer 9kg N / mu; Ratio of base fertilizer, that is, simplified fertilization (T2): 8:0:2; simplified fertilization combined with green duckweed (T3): 8:0:2+ green duckweed; fresh sample of green duckweed according to 60g / m 2 standard additions. Two weeks after rice transplanting, the investigation of the release of ammonium nitrogen in paddy field water and the final yield difference began.

[0035] The results showed that the combined application of Green Plaque can regulate the release progress of nitrogen in paddy fields ( figure 1 ), especially the nitrogen supply of the soil in the later period. Seedling soil NH 4 The average concentration of -N in T3 increased by 29.8%-56.9% compared with T1, but there was no significant difference from T2. At the peak tillering stage, there were significant differe...

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Abstract

The invention relates to a cultivation method of regulating and controlling rice field nitrogen fertilizer slow release by means of azolla imbricata combined application, and belongs to the technical field of rice cultivation. The method includes the steps that 20-50 kg of azolla imbricate is synchronously and uniformly spread to one mu of field when base fertilizer is applied before rice transplanting; after field drainage in the middle stage of tillering, a herbicide is sprayed according to the destroy effect of azolla imbricata to accelerate azolla imbricate death and promote release of green fertilizer nutrients. Based on absorbing characteristics and growth limit of green fertilizer, azolla imbricata is used as a symbiotic crop and cultivated with rice together by combining the growth requirements of rice. By means of the fertilizer absorbing characteristics of azolla imbricata, the quick-acting nitrogen fertilizer is fixed in the rice transplanting stage to reduce nitrogen fertilizer loss caused by one-time fertilizer application; in the middle and later stage of tillering, by means of the combination of high-intensity field drainage / chemical herbicide, and nitrogen fixed in azolla imbricata colony is released in the full heading stage to have the sectional slow release effect.

Description

technical field [0001] The invention belongs to the technical field of rice cultivation, and in particular relates to a cultivation method for regulating and controlling the slow release of nitrogen fertilizer in paddy fields by using combined fertilization of Phyllostachys chinensis. Background technique [0002] Back then, rice cultivation was dominated by traditional quick-acting fertilizers, and fertilizer application was based on farmers' experience. Problems such as excessive application, low fertilizer efficiency, and increased labor were common. In recent years, the development of slow-release chemical fertilizers has made up for this deficiency to a certain extent. However, slow-release fertilizers are expensive, and the cost is 1-4 times that of conventional fertilizers. As a result, this kind of fertilizer is only used for plants with high economic value such as flowers and lawns. In plants; in addition, slow-release fertilizers release more fertility in the early...

Claims

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Application Information

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IPC IPC(8): A01G1/00A01C21/00
CPCA01C21/005A01G22/00
Inventor 陈松章秀福徐春梅王丹英褚光
Owner CHINA NAT RICE RES INST
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