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【目的】研究水分胁迫对瓜列当、加工番茄寄生关系的影响和控制土壤水分含量对瓜列当的防除效果。【方法】采用PEG6000设置不同渗透式(0、-0.2、-0.26、-0.3、-0.5、-0.6、-0.7、-0.9和-1.1MPa)的方法模拟水分胁迫环境,培养种子和寄生苗后测定加工番茄和瓜列当种子的发芽率及寄生率。【结果】瓜列当可在-1.1 MPa下发芽,而加工番茄在-0.5 MPa下就已无发芽的能力。在寄生过程中,加工番茄幼苗耐旱程度到-0.7 MPa、-0.8MPa下失水死亡,瓜列当在-1.1 MPa下仍有发芽、寄生能力。【结论】在加工番茄生产中,土壤含水量多少与瓜列当滋生并无显著的关系,单纯利用控制田间灌水量或干旱胁迫来防治瓜列当滋生的效果并不理想。
【Objective】 The objective of this study was to investigate the effect of water stress on the parasitism of melon and processed tomato and to control the effect of soil moisture on melphalan. 【Method】 PEG 6000 was used to simulate the water stress environment with different osmotic (0, -0.2, -0.26, -0.3, -0.5, -0.6, -0.7, -0.9 and -1.1MPa) Determination of processing tomato and melon seeds germination rate and parasitism. 【Result】 Melon was able to germinate at -1.1 MPa, while the processed tomato had no germination ability at -0.5 MPa. In the process of parasitism, the drought tolerance of tomato seedlings was -0.7 MPa and the water loss was caused at -0.8 MPa. When melon was still at -1.1 MPa, germination and parasitism still existed. 【Conclusion】 There was no significant relationship between the amount of soil water content and the growth of melon seeds in the processing tomato production. It is not ideal to control the growth of melon seeds by controlling the field irrigation or drought stress alone.