Phân hóa học hay phân hữu cơ…cũng đều chứa các nguyên tố như nhau..đạm.lân.kali..
Khác nhau là nguồn gốc..nhưng dù nguồn gốc từ đâu,, thì đạm vẫn là..đạm.thiếu đạm trong bón thúc, không thể có rau ngon...vì đạm trong bón lót, mất đi rất nhanh do bị tưới rửa trôi. hoặc bốc hơi
Nếu các bạn ái ngại…thì dùng bánh dầu ngâm vậy, trong bánh dầu có tới 60 % đạm hữu cơ đấy, do đó nông dân trồng rau thích bánh dầu hơn URE
Khái niệm rau sạch…;là rau đươc bón bằng phân hữu cơ. Và hoàn toàn không có các hóa chất nông ngiệp ( thuốc trừ sâu. Thuốc trừ nấm.kích thích tố ngoại sinh)
ngoài thị trường có loại rau đang được bán với giá rất mắc, Mục tôi không tin ..đó là rau 100% là ...sạch thực sự ,
Ông anh,
Thật bái-phục! Ông anh đúng là bậc thầy trong việc dùng phân và sự hiểu biết tận-tường về rau sạch. Những diễn-giải của ông anh tui rất thích, bởi tui có khuynh-hướng bảo-vệ môi trường, sản-xuất và tiêu-thụ sản-phẩm sạch. Phương-pháp thủy-canh chỉ là 1 phần nhỏ đóng góp vào việc bảo-vệ môi-trường cùng với cải-thiện đất, xử-lý rác, nhà xí và nuôi trùn...
Cám ơn ông anh giảng-giải về phân hòa-học và hữu-cơ. Ông anh nói về nguồn gốc phân đạm thật hay, xin được trích, góp thêm :
- Tuy nhiên, việc dùng U-rê thì cũng là một câu hỏi để có chút tranh-luận. Trong thiên-nhiên, nó được tạo thành như là CN(NH2)2, và khi nó được nhà máy chế-tạo, nó cũng là CN(NH2)2. Không khác!
Nông-dân trồng hữu-cơ không đồng ý là chúng, U-rê trong thiên-nhiên và do chế-tạo, giống nhau. Nhưng để dùng một lượng nhỏ, cá-nhân tôi (
Ông David Murphy, một nhà bảo-vệ môi-trường người Úc) không có gì phản-đối việc dùng U-rê.
Thân.
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