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为研究不同水分条件对幼果期枇杷生理代谢的影响,以冬春季干旱的陕西安康地区(枇杷自然分布的北缘地区)14年生‘长崎早生’枇杷为材料,从2013年8月底(现蕾期)开始,分别每株树灌水0、10、20、30、40 kg,每月1次,共灌水5次,于2014年1月底采集叶片和幼果进行生理指标测定。结果显示,幼果期枇杷叶片总叶绿素和可溶性蛋白质含量随着灌水量的增加呈现先上升后下降趋势;MDA和可溶性糖含量以及PAL活性在叶片和幼果中均随着灌水量的增加而逐渐降低;脯氨酸含量和SOD活性均随着灌水量的增加呈现下降趋势;相对电导率的变化差异不明显。试验表明,当灌水量30 kg时,可使土壤水分保持在22.2%左右,有利于幼果期枇杷的生长。
In order to study the effect of different water conditions on the physiological metabolism of loquat in young fruit, the 14-year-old ’Nagasaki early loquat’ from the Ankang area in the winter and spring in the northern margin of the natural distribution of loquat was used as material. From the end of August 2013 Buds), each tree was flooded with 0, 10, 20, 30 and 40 kg of water once a month for a total of 5 times. Physiological indexes of leaves and young fruits were collected at the end of January 2014. The results showed that the content of total chlorophyll and soluble protein in loquat leaves increased at first and then decreased with the increase of irrigation amount. The content of MDA and soluble sugar and PAL activity gradually increased with the increase of irrigation amount in leaves and young fruits Decreased; proline content and SOD activity showed a downward trend with the increase of irrigation volume; the relative conductivity was not significantly different. Experiments show that when the irrigation amount of 30 kg, the soil moisture can be maintained at about 22.2%, is conducive to young fruit growth of loquat.