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12015年气候特点及对玉米生长影响1.1春季低温多雨,出苗不好5月上、中旬降水频繁,土壤湿度大,不利田间作业,导致播种期普遍拖后。5月至6月上旬气温异常低,比上年同期平均温度低1℃左右,导致粉种烂籽现象较多,出苗晚,出苗率低,出苗不齐。有的品种未能抵抗住这场低温多雨的考验,损失惨重。低温严重抑制了幼苗生长,导致药害和根腐病普遍发生,出现矮化、黄白条斑等各种往年极少见的不正常苗。低温多雨还导致2015年玉米分蘖现象较普遍。1.2拔节期高温,穗位增高2015年由于播种期拖后,生育进程推迟,玉米拔节
Climate characteristics of 12015 and the impact on the growth of corn 1.1 Spring low temperature and rainy, poor emergence In May on the middle and frequent precipitation, soil moisture, adverse field operations, resulting in a general delayed after sowing. From May to early June, the temperature was abnormally low, about 1 ℃ lower than the average temperature of the same period of last year, resulting in more rotten seeds, late emergence and low emergence rate. Some species failed to resist the test of this low temperature and rain, heavy losses. Low temperature severely inhibited the growth of seedlings, resulting in phytotoxicity and root rot occur generally, dwarfing, yellow and white spots and other previous years is extremely rare abnormal seedlings. Cold and rainy weather also led to more widespread tillering in maize in 2015. 1.2 jointing period of high temperature, ear position increased in 2015 due to delayed sowing, fertility process postponed, corn jointing