Influence of temperature and humidity environment on pre-harvest sprouting of spring wheat in Heilongjiang province

doi:10.14088/j.cnki.issn0439-8114.2022.03.006

Abstract

Abstract: In order to clarify the effects of different temperature and humidity conditions on pre-harvest sprouting during maturity, in this study, Longmai 35 was used as the test material which was the main cultivar in the Heilongjiang northern wheat region, set three levels of temperature （15、20、25 ℃） and relative humidity （80%, 85%, 90%）, respectively. The effects of different temperature and humidity treatments in the mature period of pre-harvest sprouting start time, pre-harvest sprouting rate, germination energy, whole ear moisture change rate and thousand-grain weight were analyzed, in order to provide theoretical reference for pre-harvest sprouting identification and harvest management. The results showed that the interaction of temperature and humidity has a significant effect on pre-harvest sprouting at the mature stage. At 15 ℃ and 20 ℃, RH80% treatment delayed the start of pre-harvest sprouting, reduced the pre-harvest sprouting rate, delayed the rate of change of the whole ear moisture, and slowed down the thousand-grain weight. 15 ℃, RH90% （T1H3） significantly increased pre-harvest sprouting rate, reaching 46.77% on the third day. But at 25 ℃, RH90% treatment inhibited pre-harvest sprouting process of mature wheat, pre-harvest sprouting rate on the 7th day was only 27.87%. Under the same humidity, with the increase of temperature, the germination process is delayed, the germination start time is prolonged, the pre-harvest sprouting rate, germination energy, and the change rate of whole ear moisture are gradually reduced, and the thousand-grain weight decline rate slows down. 15℃, RH90% （T1H3） treatment can significantly accelerate the change of the whole ear moisture of mature spring wheat, promote pre-harvest sprouting process, increase pre-harvest sprouting rate and the germination energy.

Key words: wheat, pre-harvest sprouting, temperature, humidity

CLC Number:

S512.1⁺2

DU Shi-chao, XUE Ying-wen, GUO Wei, YU Li-he. Influence of temperature and humidity environment on pre-harvest sprouting of spring wheat in Heilongjiang province[J]. HUBEI AGRICULTURAL SCIENCES, 2022, 61(3): 26-31.

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