摘要
与露地土培条件下作物干物质积累一般呈“s”曲线特征有所不同 ,番茄无土基质栽培的干物质积累曲线基本上呈直线。其吸收氮磷钾的比例也不同于露地土培 ,露地土培吸收较多的磷 ,设施无土基质栽培吸收较多的钾。番茄的钙营养除了合理供应外 ,也应注意钙在体内的运输、分配。番茄的钙营养诊断取样 ,应在第三层果枝开花前取叶片样品 ,第三层果枝座果后应取叶柄样品。
According to our experiment on soilless installation cultivation of tomato in 1998, the curve of dry matter accumulation in tomato plants is radically lineary, namely, different from the S shaped curve reported elsewhere in case of open soil cultivation. In addition, there are also differences in proportion of absorbed N, P, K between the two cultivation modes, the tomato plants absorb more K in soilless installation cultivation but more P in open soil cultivation. As to Ca nutrition, in addition to rational supply of Ca, both transport and distribution of the element in tomato plants should be emphasized. For diagnosing calcium nutrition of tomato plants, when samples are taken during the period before flowering on third level bearing shoots, leaves should be sampled; when samples are taken during the period after fruit setting on the same shoots, petioles should be sampled.
出处
《上海农业学报》
CSCD
2001年第3期76-79,共4页
Acta Agriculturae Shanghai
基金
上海市农业科学院青年科技基金项目 (97 0 2 0 1 2 )
