Rice water-saving irrigation method

A rice and water layer technology, applied in the agricultural field, can solve the problems such as the difficulty of monitoring the instantaneous soil moisture status, the limitation of soil types, and the technical difficulty, and achieve the effects of easy mastery, simple use and low price.

Active Publication Date: 2015-08-26
YANGZHOU UNIV
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems that the measurement index of soil moisture in the current rice water-...

Method used

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  • Rice water-saving irrigation method
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Examples

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Embodiment 1

[0030] Example 1: Fabrication of PVP pipe for measuring soil depth

[0031] (1) Choose PVP pipes with an inner diameter of 19cm and an outer diameter of 20cm. The lengths of the PVP pipes are 32cm, 37cm and 42cm, respectively, which are used for sand, loam and clay soils;

[0032] (2) Start drilling at 15cm from the top of the PVP pipe. The distance between the two holes is 4cm in the longitudinal direction and 3cm in the transverse direction. The two adjacent rows of holes in the longitudinal direction are arranged crosswise, with a diameter of 0.5cm;

[0033] (3) To facilitate the observation of soil water depth, use the PVP pipe with a length of 32cm in sandy soil. Starting from the first row of holes at the top, opening holes at 6cm, 8cm, 10cm, 12cm and 15cm respectively from top to bottom. Mark the corresponding position on the inner side of the PVP tube; for the 37cm-long PVP tube in the soil, start with the first row of holes at the upper end and go from top to bottom. Make ho...

Embodiment 2

[0034] Example 2: High-efficiency water-saving irrigation method for rice

[0035] Three types of soil, sand, loam and clay were selected in Yangzhou and Lianyungang from 2013 to 2014, and japonica rice varieties were purchased from Yangzhou Seed Company (for pilot planting in Yangzhou) and Lianyungang Seed Company (for pilot planting in Lianyungang). Lianjing No. 7 was planted in the field, and the experiment of efficient water-saving irrigation method for rice was carried out, and the local conventional irrigation method was used as a control.

[0036] Efficient water-saving irrigation methods:

[0037] Before transplanting Lianjing No. 7, PVP pipes were installed in the field. From transplanting to turning green, keep a 2~3cm water layer in the field; after turning green to live, observe the depth of water in the PVP pipe once a day from 10:00 to 12:00 when the soil is dry. According to the PVP pipe water depth, that is, the depth of soil water (see Table 1) to determine whether...

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Abstract

The invention provides a rice water-saving irrigation method. According to the method, the soil depths buried in water at different growth periods in different soil types can be monitored through a monitoring device, and an appropriate soil depth buried in water is taken as the irrigation index to confirm the irrigation water volume, so that the water supply meets the water demand for the growth and development of rice. The method solves the problems that in the conventional rice water-saving irrigation method, the instantaneous soil water content condition cannot be monitored based on the measurement index for soil water content, the monitoring is limited to soil types, the cost is high and the technical difficulty is huge, and the collaborative improvement on yield and water content use efficiency is realized.

Description

Technical field [0001] The invention belongs to the technical field of agriculture, and specifically relates to a water-saving irrigation method for rice. Background technique [0002] Global agriculture in the 21st century faces two major challenges: one is to continuously increase food production in order to meet population growth, and the other is to cope with the problem of declining water resources while increasing food production. Rice is one of the most important food crops in the world. About 3 billion people provide 35% to 60% of dietary calories. Rice is also the crop that consumes the most water. In Asia, irrigation water for rice accounts for about 80% of agricultural water (Bouman et al. 2001, 2007). With the growth of the world’s population, the development of cities and industries, the global climate change, and the increase in environmental pollution, water resources for crop irrigation are becoming increasingly scarce, which seriously threatens the development o...

Claims

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Application Information

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IPC IPC(8): A01G16/00A01G25/00A01G22/22
CPCA01G22/22A01G25/00
Inventor 杨建昌许更文张建华王志琴
Owner YANGZHOU UNIV
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