[Effects of irrigation at flowering stage on soil nutrient and root distribution in wheat field].

To provide theoretical support the full use of water and fertilizer resources for wheat, we explored the effects of irrigation on wheat yield, plant and soil nutrient distribution during flowering period and its relationship with root characteristics. We set up two treatments by using the 2 m deep soil column cultivation method with irrigation during flowering (T) and no irrigation during flowering (T), with the drought-resistant and high-yield cultivar Luomai 28 (LM28) and the high photosynthetic efficiency cultivar Bainong 207 (BN207) as materials. We measured contents of nitrogen, phosphorus and potassium in plants and soils, as well as the characteristics of soil roots.

[The germinating characters of the transgenic rice seeds in the stress condition of antibiotic G418 and their application in crop breeding].

The seeds of transgenic rice line D2-1-2 and the receptor cultivar Zhonghua No.9 were germinated on the stress condition of the antibiotic G418. The number of taking root seed, the length of root and the length of shoot of two used materials were checked in different concentrations of the antibiotic G418, but the ratio of germinating seed was not affected.