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Irrigation and Melioration

Article Title

EFFECT OF BENTONITE CLAY ON THE IRRIGATION NORM OF WINTER WHEAT

Abstract

In the experiments conducted on typical serozem soils in the Tashkent region, two soil moisture levels of 60-70-60 and 70-80-70% of LFMC were studied, and two norms of mineral fertilizers NPK: 200-140-100 and 150-105-75 kg/ha with additional application of bentonite clays in the amount of 1500-3000-4500 kg/ha for plowing before sowing of winter wheat. The obtained data show that when watering with soil moisture 60-70-60% of LFMC with application of mineral fertilizers with NPK norms: 200- 140-100 and 150-105-75 kg/ha and application of bentonite clays in the amount of 1500, 3000 and 4500 kg/ha, the saving of irrigation water in comparison with the control variant, respectively, amounted to 770 m3/ha, 810 m3/ha and 850 m3/ha, and the grain yield increase of 6,9-8,8-10,1 c/ha from the norm of mineral NPK fertilizers: 200-140-100 kg/ha, and an increase in the grain yield of 11,3-13,4-14,7 centner/ha from the norm of mineral fertilizers NPK: 150-105-75 kg/ha. Carrying out irrigations with soil moisture of 70-80-70% of LFMC with the use of mineral fertilizers together with bentonite clay in the amount of 1500- 3000-4500 kg/ha, the saving of irrigation water in comparison with the control was 630 m3/ha, 790 m3/ha and 890 m3/ha, where the increase in the grain yield increased 6,3-8,9-10,7 c/ha with the norm of mineral fertilizers NPK: 200-140-100 kg/ha, and 10,4-12,9-14,6 centners per hectare with the norm of mineral fertilizers NPK: 150-105-75 kg/ha.

First Page

31

Last Page

35

References

1. Абдурахмонов С.О., Тунгушова Д.А. ва бошқ. Бентонит қўлланилганда пахта ҳосилдорлиги // “Ўзбекистон республикаси қишлоқ хўжалигида сув ва ресурс тежовчи агротехнология” мавзусидаги халқаро илмий-амалий конференция маърузалари асосидаги мақолалар тўплами. ЎзПИТИ. - Тошкент, 2008. - 301-302-бетлар. 2. Абдурахмонов С.О., Болтаев С.М. ва бошқ. Бентонит самараси // "AGRO ILM" журнали. - Тошкент, 2008. - №4. - 20-21-бетлар. 3. Абдурахимов Ш. Фарғона вилоятининг ўтлоқи соз тупроқлари шароитида кузги буғдойни суғориш тартиблари ва минерал ўғитлар меъёрларининг самарадорлиги. Автореф. дис. ... канд. наук. - Тошкент, 2006. - 14-8-бетлар. 4. Тунгушова Д.А., Болтаев С.М., Абдурахмонов С.О., Белоусов Е.М. Бентонит лойқасининг ғўзанинг ўсиши, ривожланиши ва ҳосилдорлигига таъсири // "Пахтачилик ва дончиликни ривожлантириш муаммолари” мавзусидаги халқаро илмий-амалий конференция маърузалари асосидаги мақолалар тўплами. ЎзПИТИ. - Тошкент, 2004, - 156-158-бетлар.

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