田菁(Sesbania cannabina Pers.)结瘤固氮的研究 Ⅱ.不同土壤水分对田菁生长与结瘤固氮的影响

• 作 者: 钟锡粦 卢仁骏 连兆煌
• 机 构: 华同农业大学土化系,华同农业大学土化系,华同农业大学土化系
• 出 处: 华南农业大学学报
• 发表日期: 1985年03期
• 关键词: 土壤水分 田菁 田间持水量 固氮 结瘤 淹水 抛物线型 土壤水分状况 豆科作物 根瘤

经过三年用土培、砂培、田间小区等方式做了十四批试验。得出淹水栽培的田菁在株高、茎叶产量、根瘤数量与重量、株瘤固氮总活性等主要性状上均劣于土壤水分状况为田间持水量的旱栽的结论。并找到了其必然性的原因。否定了田菁淹水栽培优于旱栽的说法。 田菁与土壤水分关系的生长曲线是以田间持水量为顶点的三次抛物线型。有别于前人以其他豆科作物作出的二次抛物线型。田菁耐淹力强于耐旱力。缺水(低于田间持水量的60％)的危害比水分过多(淹水)严重。生产中常出现淹水优于旱栽的现象,是两害相较轻为优的反映。在灌溉设施不完善的情况下,生产中实行淹水栽培还是可取的。

After three years with soil culture, sand culture, field plots and other ways to do fourteen batches of experiments. It was concluded that the main characters of plant growth, stem and leaf yield, number and weight of nodules, total nitrogen fixation activity of the tumor were worse than those of the soil moisture status. And found the reason of its inevitability. Denied Tianjing flooding cultivation is better than dry planted. The growth curve of the relationship between Sesbania and soil moisture is the third-order parabola at the apex of field capacity. Different from the predecessors made with other legumes quadratic parabolic. Tian Jing flood-tolerant than drought-resistant ability. Water scarcity (less than 60% of field capacity) is more harmful than water (flooding). The phenomenon of flooding is better than that of dry planting is often found in production, reflecting the fact that the two pests are comparatively light. In the case of inadequate irrigation facilities, the implementation of flooding cultivation is desirable.