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我县岭麦,由于土壤肥力低,砂性大,表现为前期长势好,分蘖多,叶色绿,根系较发达;中后期随着干旱、脱肥,出现早衰,大分蘖死亡多,小花退化重,造成穗数不足,穗头变小。据三年苗情定点调查资料:岭麦最高茎蘖每亩105.0万,比稻茬麦低18.4万;成穗数21.2万,比稻茬麦低20.4万;成穗率20.1%,比稻茬麦低13.6%;小穗排数16.2,比稻茬麦少1.2;退化排数6.7,比稻茬麦高3.6。因此,提高成穗率,减少小花退化,是岭麦春季管理的技术关键。具体措施为:
Due to the low soil fertility and big sand, our county wheat has good growth in the early stage, more tillers and more green leaves with more developed roots. In the middle and later stages of drought, the occurrence of premature aging, big tiller death and floret degeneration Heavy, resulting in insufficient spikes, smaller head panicle. According to the survey data of three years of Miao situation: the highest tillering of wheat flour 1.05 million per acre, wheat 184.4 thousand less than the rice stubble; into the ear number 212 000, lower than the rice stubble 204 000; ear rate of 20.1% Wheat low 13.6%; spikelet row number 16.2, less than the rice stubble wheat 1.2; the number of rows 6.7, higher than the rice stubble 3.6. Therefore, to increase the rate of spike, reduce the floret degradation, is the key technology of wheat spring management. Specific measures are: