Ảnh hưởng của nước tưới nhiễm mặn đến sinh trưởng, năng suất lúa và một số tính chất đất phù sa sông Hồng không được bồi hàng năm trong điều kiện nhà lưới = Effects of saline water irrigation on rice yield and growth in alluvial soils of red river delta under net-house conditions

0 Người đánh giá. Xếp hạng trung bình 0

Tác giả: Thị Lan Phương Đinh, Thị Hằng Nga Nguyễn, Thị Khắc Vũ

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khoa học Kỹ thuật Thủy lợi và Môi trường, 2020

Mô tả vật lý:

Bộ sưu tập: NCBI

ID: 471232

Thêm vào giỏ

Mục tiêu của nghiên cứu nhằm đánh giá ảnh hưởng của nước tưới bị nhiễm mặn lên sinh trưởng, năng suất lúa và một số tính chất đất trong điều kiện nhà lưới. Thời gian thực hiện từ tháng 2/2019–10/2019 với 02 vụ lúa tại khu vực nhà lưới Học viện Nông nghiệp Việt Nam. Đất thí nghiệm là đất phù sa trung tính ít chua vùng đồng bằng sông Hồng chưa bị nhiễm mặn với độ mặn (ĐM) 0,1‰, pHKCl từ 5,7 – 6,4. Nghiệm thức tưới mặn với 05 điểm nồng độ gồm 1,5
2
3
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5‰. Công thức(CT) đối chứng (ĐC) là đất sạch chưa bị nhiễm mặn được tưới nước có ĐM 0‰. Mỗi CT thí nghiệm được lặp lại 03 lần/vụ. Độ dẫn điện EC, tích lũy mặn, pH và kẽm dễ tiêu, chiều cao cây và sự phát triển lá được xác định sau 20, 40, 60 ngày sau cấy (NSC). Năng suất được theo dõi sau thu hoạch. Các kết quả thu được cho thấy, tưới mặn đã ảnh hưởng nghiêm trọng đến sự sinh trưởng và năng suất của lúa. Trong đó ĐM lớn hơn 3‰ làm giảm năng suất lúa tới 50% và ĐM 4 – 5‰ ức chế hoàn toàn sinh trưởng của lúa (lá lúa chỉ đạt 1/3 chiều dài, bị già hóa sớm dẫn đến năng suất lúa chỉ đạt từ 0 – 26% so với ĐC).Tưới mặn từ 3 – 5‰ còn làm giảm dinh dưỡng kẽm dễ tiêu trong đất từ 3 – 12,88 lần. Từ khóa Tưới nhiễm mặn, stress mặnThis study aims to examine the influence of salinity stress on growth, rice grain yield and some properties of soil under net-house conditions. Experiments were conducted in net houses Vietnam National University of Agriculture, Gia Lam, Ha Noi during two rice crops f-rom 2/2019 to 10/2019. The neutral alluvial soil with a salinity of 0.1 ‰ and pHKCl f-rom 5.7 to 6.4 was collected in the Red River Delta. Saline treatments were 5 concentration points including 1.5
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5 ‰. The control formula (CF) is irrigated by clean water with 0 ‰ salinity. Each experimental treatment was repeated 3 times/crop. Besides, some soil properties such as EC conductivity, salinity accumulation, pH, available zinc, plant growth are determined after 20, 40, 60 days. Grain productivity is determined after harvest. The results show that saline stress seriously affected rice growth and grains. In the 3 ‰ salinity treatment, the rice yield reduced by 50% and at salinity 4 – 5‰ limited rice growth. For example, the length of rice leaves was only by 1/3 of CF and rice productivity was only f-rom 0 ÷ 26% of CF). At the same, stress salt 3 – 5‰ reduces ability zinc nutrient in paddy soil f-rom 3 – 12.88 times. Keywords saline water irrigation, salt stress

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