Effect of integrated nutrient management on water use and water-use-efficiency in wheat (Triticum aestivum) -rice (Oryza sativa) crop sequence in N-W Himalayas

Chaodhary, A.K.; Thakur, R.C.; Naveen Kumar

Indian Journal of Soil Conservation 34(3): 233-236


ISSN/ISBN: 0970-3349
Accession: 013362663

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A field experiment was conducted in Palampur, Himachal Pradesh, India during rabi 1999-2000 to kharif 2001 to study the effect of integrated nutrient management on water use, water-use-efficiency and crop productivity in wheat-rice crop sequence in N-W Himalayas. The treatments comprised five sources of organic manures (farmyard manure (FYM) at 10 t/ha, mushroom spent compost (MSC) at 10 t/ha, in situ berseem [Trifolium alexandrinum] green manure, MSC at 5 t/ha+FYM and in situ berseem green manure+FYM) and three fertilizer levels (50, 100 and 150% of recommended NPK) in wheat along with a control, while rice was grown with 100% of recommended NPK fertilizers and control. The application of FYM at 10 t/ha resulted in significantly lowest water use of 575.8 and 514.2 mm by wheat in rabi 1999-2000 and 2000-2001 and 1409.9 and 1538.6 mm by rice in kharif 2000 and 2001, respectively. MSC+FYM and berseem green manuring+FYM were at par with FYM at 10 t/ha with respect to water use. Berseem green manuring registered significantly the highest water use both in wheat (578.7 mm in 1999-2000 and 517.4 mm in 2000-2001) and rice (1411.3 mm in 2000 and 1540.7 mm in 2001), followed by MSC. Application of FYM at 10 t/ha also resulted in significantly the highest water-use-efficiency of 7.77 and 8.89 kg ha-1 mm-1 of wheat yield during 1999-2000 and 2000-2001 and 3.17 and 3.08 kg ha-1 mm-1 of rice yield during 1999 and 2000, respectively. Crop productivity in wheat (44.75 and 45.72 q/ha) and rice (44.66 and 47.46 q/ha) during both years was also higher with FYM at 10 t/ha, followed by berseem green manure+FYM, MSC+FYM and MSC and berseem green manuring. A significant reduction in total water use and improvement in water-use-efficiency and crop yields was recorded with increasing levels of recommended NPK both in wheat and rice. The integration of FYM with 150% of recommended NPK in wheat and 100% of recommended NPK in rice appeared to be superior to realize highest crop productivity and water-use-efficiency in wheat-rice crop sequence in N-W Himalayas.