Effects of Irrigation at Different Growth Stages on Growth and Yield of Late-sown Wheat under Rice Stubble

doi:10.11924/j.issn.1000-6850.casb16090084

Abstract

Abstract: The aims are to explore the effect of irrigation at different growth stages on growth and yield of latesown wheat under rice stubble, and provide a scientific basis for irrigation of late-sown wheat under rice stubble. In field conditions, taking‘huaimai 33’as the experimental material, the authors studied the effects of irrigation at the stages of overwintering, pre-returning green, pre-jointing and early filling on wheat growth and yield by using artificial irrigation. The results showed that individual and population growth of wheat irrigated at early winter stage and pre-returning green stage were better than that of pre-jointing stage and early filling stage. And, the growth of wheat was significantly enhanced with the increase s of watering times. Spike differentiation of wheat irrigated at pre-returning green stage and pre-jointing stage could be advanced and the grain number could be increased. It showed that the A2B2B3 treatment had 3.76 more grains per spike than that of CK. The yield did not increase with the increase of the watering times. The maximum yield was obtained by irrigated twice at early winter stage and pre- jointing stages, the yield increased by 15.85% compared with the CK. Thus, the irrigation at pre-returning green stage and pre-jointing stage might be more suitable for late-sown wheat under rice stubble because it not only enhanced the growth of individual and population, ensure the effective ear number, but also improved the grain numbers per spike to increase the yield.

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