压砂地枸杞氮、钾消耗过程研究

Nitrogen and Potassium Consumption of Chinese Wolfberry on the Gravelsand Mulched Field

以压砂地枸杞为研究对象,在宁夏中卫市香山镇红圈子村尹东队进行大田试验,研究压砂地枸杞氮、钾消耗过程。结果表明,氮素的消耗在枸杞生育期内呈现先升高再下降的趋势,全生育期各处理的平均耗氮量为0.285 g/kg,萌芽期-盛花期、初次果实膨大期、盛果期、秋果期、落叶期占全生育期氮素消耗量的比例分别为13.3%,24.5%,34.4%,22.5%,5.3%;随着氮、钾肥施量的增加,枸杞在全生育期内氮素的消耗相应增大。钾素的消耗在枸杞生育期内同样呈现先升高再下降的趋势,全生育期各处理钾素的平均消耗量为0.341 g/kg,萌芽期-盛花期、初次果实膨大期、盛果期、秋果期、落叶期占全生育期钾素消耗量的比例分别为13.2%,27.3%,31.1%,23.2%,5.2%;随着氮、钾肥施量的增加,枸杞在全生育期内钾素的消耗相应增大。因此,压砂地枸杞在初次果实膨大期、盛果期对氮钾元素需求较大,在此期间应加大氮钾肥施量。

In this paper,Chinese wolfberry on the gravel-sand mulched field was taken as the research object,and the field experiment was carried out in the Yindong team of Honghuan village,Xiangshan town,Zhongwei city,Ningxia,to study the nitrogen,N and potassium,K consumption process.Results show that the consumption of Nin wolfberry breeding period showed a trend of rise firstly and then fall and the average N consumption is 0.285 g/kg in the whole stages.The proportion of N consumption in the whole growth stage was 13.3%,24.5%,34.4%,22.5%and 5.3%respectively in the bud-coated,first fruit enlargement period,the full fruit,autumn fruit and fallen leaves staged.The consumption of Kin the Chinese wolfberry fertility period also showed a trend of rise firstly and fall with an average consumption of 0.341 g/kg.The proportion of consumption of K in the whole growth period was 13.2%,27.3%,31.1%,23.2%and 5.2%in the bud-coated,first fruit enlargement period,the full fruit,autumn fruitand fallen leaves stages.During the whole growth period,the consumption of N and K of Chinese wolfberry increased with the increase of N and K fertilizer application.Therefore,the application amount of N and K should be increased during the first fruit expansion and full fruit period.