Research and building production safe lettuce, cucumber, cherry tomato in greenhouse at Da Lat, Lam Dong, Viet Nam
Directly cultivation on soil is a method of traditional vegetable production. This production method has the advantage of easy, producing a large area but the downside is unpredictable in quality and yield of vegetables. With quality requirements and the increasing number of consumers, this is barr...
Đã lưu trong:
| Những tác giả chính: | , , , , |
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| Định dạng: | Report |
| Ngôn ngữ: | Vietnamese |
| Được phát hành: |
2023
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| Truy cập trực tuyến: | https://scholar.dlu.edu.vn/handle/123456789/2596 |
| Các nhãn: |
Thêm thẻ
Không có thẻ, Là người đầu tiên thẻ bản ghi này!
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| Thư viện lưu trữ: | Thư viện Trường Đại học Đà Lạt |
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| Tóm tắt: | Directly cultivation on soil is a method of traditional vegetable production. This production method has the advantage of easy, producing a large area but the downside is unpredictable in quality and yield of vegetables. With quality requirements and the increasing number of consumers, this is barrier the development of vegetable industry in our country. Besides the area of arable land is increasingly shrinking due to urbanization......, polluted and degenerated land area is increasing, so need to find the right direction for the vegetable industry.
Throughout the last century, scientists and horticulturists experimented with different methods of hydroponics. One of the potential applications of hydroponics that drove research was for growing fresh produce in nonarable areas of the world. Nowadays, the hydroponic application in agricultural production have been developed in some developed countries. However, this production system requires high initial cost and requires producers to have certain qualifications. In the economic conditions of farmers is still limited, low technical level, the application of vegetable production on available substrate such as coir dust, peat in greenhouse is necessary and reasonable.
Research results:
For the lettuce
- Substrate: The best substrate for lettuce production is a mixture of peat and Dasa X2 by the ratio of 2:1.
- Dosage fertilization: Apply 100kg N - 100kg P2O5 - 75kg K2O per hectare for high yield and good quality.
- Type of fertilization: Use of Realstrong Bio-Organic Fertilizer for the high yield and quality production of lettuce.
- Method of fertilization: Should apply additional fertilizer for lettuce at stage 5 and 12 days after planting
- Harvesting lettuce after fertilization at least 8 days to ensure low levels of nitrate in vegetables.
For the cucumber
- Substrate: The best substrate for cucumber production is a mixture of peat and Dasa X2 by the ratio of 2:1.
- Dosage fertilization: Apply 132kg N - 121kg P2O5 - 198kg K2O per hectare for high yield and good quality.
- Type of fertilization: Organic fertilizers obtain as yield as mineral fertilizers, but nitrate concent is lower than mineral fertilizers. In four types fertilizer, Realstrong Bio-Organic Fertilizer obtain the highest yield and quality.
- Method of fertilization: Fertilization for the cucumber according to 8 days cycle is the most appropriate.
- Harvesting: To reduce the nitrate content in fruit should not harveste on the 5th day after fertilization (fertilization cycle 8 days/times).
For cherry tomatoe
- Substrate: The best substrate for tomato production is a mixture of peat and Dasa X2 by the ratio of 1:1.
- Dosage fertilization: Apply 257kg N - 200kg P2O5 - 400kg K2O - 24kg Ca per hectare for high yield and good quality.
- Type of fertilization: Mineralfertilizershave tendency tohigher yield and nitrate content than organic fertilizers. In four types of fertilizer, Mekong organic Fertilizer obtain the highest yield and quality.
- Method of fertilization: Fertilization for the tomato according to 10 days cycle is the most appropriate.
- Harvesting: With 10 days fertilization cycles per time, should not harvest fruit on day 3 after fertilization, because the nitrate content in the fruit is highest at this day. |
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