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DIT TANAH SEHAT — KONSEP DASAR

TANAH  SEHAT  –  KONSEP DASAR 

 

Kesehatan tanah adalah penilaian kemampuan tanah untuk memenuhi serangkaian fungsi ekosistem (tanah) yang sesuai dengan lingkungannya.

Istilah “Kesehatan tanah”  digunakan menilai kemampuan tanah untuk:

  1. Mempertahankan produktivitas tanaman dan produktivitas ternak, serta  keanekaragamannya;
  2. Mempertahankan atau meningkatkan kualitas air dan udara;
  3. Mendukung kesehatan manusia dan tempat tinggalnya.

Prinsip yang mendasari dalam penggunaan istilah “kesehatan tanah” adalah bahwa tanah tidak hanya berfungsi sebagai media tumbuh, melainkan ia juga bersifat “hidup”, dinamis dan ikut menentukan kualitas lingkungan.  Istilah analoginya adalah “kesehatan manusia” dan mengkategorikan tanah yang sehat sebagai :

  1. Tanah yang dalam keadaan komposit “bagus” dari segi biologis, kimia dan fisik;
  2. Tanah tidak sakit atau tidak terdegradasi atau tidak menyebabkan dampak negatif eksternal ;
  3. Tanah yang kualitasnya sedemikian rupa sehingga dapat berfungsi dan berpotensi penuh , serta tahan terhadap degradasi;
  4. Tanah yang mampu menjalankan berbagai macam fungsi (khususnya penyediaan hara , menyimpan karbon dan siklus air) dan mampu mempertahankan kemampuan ini ke masa depan.

Kesehatan tanah adalah kondisi tanah dalam ruang tertentu dan pada skala tertentu terhadap baku-mutu yang “jelas”. Definisi kesehatan tanah bervariasi di antara para pengguna alternatif  dan menempatkan prioritas yang berbeda pada fungsi tertentu.

Oleh karena itu, “kesehatan tanah”  hanya dapat dipahami dalam konteks penggunanya, dan aspirasinya tentang tanah, seperti halnya “definisi”  tentang tanah.

 

Tanah yang berbeda akan memiliki tolok ukur “kesehatan” yang berbeda tergantung pada karakteristik dan  kualitasnya , dan pada keadaan geografisnya.

Secara generik “tanah sehat” didefinisikan sebagai berikut :

  1.     Mempunyai pilihan “Produktif ” yang luas ;
  2.     Mempunyai Keaneka-ragaman hayati yang luas ;
  3.     Mampu menyerap , menyimpan , mendaur-ulang dan sifat-olah yang bagus, dalam batas-batas yang ditetapkan oleh kondisi iklim ;
  4.     Kualitas air limpasannya memenuhi adalah standar yang bagus;
  5.     Mempunyai Entropi rendah, dan ,
  6.     Tidak ada kerusakan , atau kehilangan komponen-tanah yang penting.

Konsep “tanah sehat” tersebut dijabarkan menjadi:

  1. Penutup tanah berupa vegetasi yang komprehensif ;
  2. Kadar karbon relatif dekat dengan batas-batas yang dipersyaratkan dan ditetapkan oleh jenis tanah dan iklim ;
  3. Sedikit kebocoran hara dari ekosistem ;
  4. Produktivitas biologisnya  relatif dekat dengan batas yang ditetapkan oleh lingkungan tanah dan iklim ;
  5. Tingkat erosinya alamiah (erosi geologis) ;

  6. Buy cheap Viagra online

  7. Tidak ada akumulasi kontaminan ,
  8. Ekosistem tanah tidak bergantung secara berlebihan pada input energi fosil.

 

SoilHealthConcept.jpg

Selengkapnya lihat:

http://en.wikipedia.org/wiki/Soil_health

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