cara irigasi wis "nyababaken" lemah

Kanggo wong sing paling, salinization lemah loro menowo lan ora pati ngerti. Menowo iku, akeh wilayah kayata China wilayah pesisir lan wilayah daratan duwe gedhe wilayah saka tanah saline-alkali sing bisa katon nang endi wae. Ing tatanan tanah saline-alkali kayata gegandhengan iklim lokal, lemah, topografi, geomorfologi sacara, geology lan faktor liyane. Alkalinization. Ora pati ngerti iku salinization lemah saka tani disebabake ngukur manungsa khayal ora dimangerteni.
Unreasonable human measures are mainly due to the unreasonable irrigation and drainage system, excessive irrigation, poor drainage, causing the groundwater level to rise, resulting in soil salinization, which is called soil secondary salinization. Saline-alkali land is increasing every year, because of the “contribution” of human beings. There are more and more secondary salinization sites, and about 10 million hectares of land are discarded each year due to secondary salinization of the soil.
According to research, the two rivers of one of the world’s four major civilizations, the main cause of extinction is the secondary salinization of soil.

Carane ora timbal khayal irigasi kanggo salinization lemah?
Lemah salinization, ing syarat-syarat prasaja, iku nambah uyah ing lumahing lemah ngluwihi toleransi saka tanduran lan mengaruhi wutah normal saka tanduran.

Flood irrigation

 Apa iku utami utawa secondary, paling saka uyah nambah ing lumahing lemah asalé saka lemah, lan banyu soko njero lemah mundhak lumahing near lumahing dening tumindak kapiler, nggawa uyah kanggo lumahing lemah.
The key to this is “groundwater rise.” If the amount of irrigation is too large, the water will penetrate down a lot, the drainage will be poor, the groundwater level of the cultivated land will rise, the groundwater will get closer and closer to the ground, and the salt carried in the water will easily reach the surface.
In this process, it is necessary to introduce a strong assist in the accumulation of salt on the surface – strong evaporation.
When groundwater brings soil salinity to the surface, strong evaporation will quickly turn the water into water vapor, unable to continue to carry salt, and the salt will stay on the soil surface. After a period of ascending-accumulating cycles, the surface of the soil accumulates salt, and for a long time, the soil will be salinized.
The secondary salinization of soil mainly occurs in the arid and semi-arid areas with strong evaporation, and the evaporation is greater than the rainfall. It is distinguished from the native salinization of the soil, mainly as a result of human economic activity.

Secondary salinization of soil

 cara perawatan salinization lemah

Lemah perawatan salinization wis tansah dadi masalah utama ngadhepi dening ilmuwan lemah. Apa iku salinization utami utawa salinization secondary, ngukur iku padha. Cara dhasar saka governance kanggo Cut mati ing lemah munggah-uyah proses klempakan munggah-penguapan.
Improve agricultural drainage system
Utamané saka ngilekake banyu, got, siltation, anti-seepage lan Manajemen tombol liyane. Banyu seger (udan utawa ngilekake banyu banjir) digunakake kanggo mbilas lemah, lan sistem got cepot Kelembapan lemah keluwihan metu saka lemah ing wektu. Toya bisa ngruwat lemah lan njupuk liyane uyah. Sareh, tingkat banyu soko njero lemah bisa kontrol menyang ambane aman, kalem mudhun penguapan lemah lan ngurangi gerakan uyah munggah.
Film lemah
Liwat nutupi lemah, iku bisa nyegah lumahing lemah saka teka menyang kontak karo atmosfer, nyuda penguapan lan nyuda munggah soko njero lemah.
Cara owah-owahan lemah
langsung ngganti lemah saka lumahing saline-alkali kanggo lemah kualitas. Tanduran crops toleran uyah uga perawatan umum.
For secondary salinization, the most important thing is to improve the irrigation and drainage facilities to prevent excessive irrigation during irrigation; after irrigation, the excess water can be discharged in time. The agricultural drainage system is currently the most widely used and effective solution. It fundamentally cuts off the cyclical process of groundwater rise-salt up-evaporation and salt accumulation. The rest of the methods are improvements under existing conditions.