Effectiveness of chemical fertilisers on the growth and water requirement of wheat
Tóm tắt
A detailed study has been made to elucidate the after-effects of the addition of certain fertilisers,e.g., ammonium sulphate, ammonium phosphate, potassium sulphate, superphosphate and potash mixture on the growth and water requirement of wheat. Treated plants in general exhibit decided improvement in their growth than the untreated ones. While the height, tiller number and total dry matter accumulation per plant are significantly better in all the fertilised series than the unmanured ones, K78.7 (potassium sulphate) and P66 (superphosphate) applied alone do not show significantly higher increase in the yield of grain and straw as also of the length of earhead or the absolute weight of the grains. The general effect of the fertilisers is to cut short the water requirement of the treated plants to values much below that obtained for the control ones although with P66 (superphosphate) and N16.5K18P16.5 (potash mixture) the differences are not statistically very significant. The total amount of water necessary for raising a successful crop of wheat is therefore less in certain cases,e.g., potash sulphate and superphosphate, while in other series it increases beyond the values recorded for control apparently due to the very high yield of grain obtained in these cases. Thus, the application of fertilisers besides showing the higher yield of the crop has the added advantage of minimising the cost of irrigation.
Tài liệu tham khảo
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