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1·The drain pipe jointing material of cement mortar with addition of water glass can effectively overcome the influence of groundwater and improve the quality of the joints.

在水泥砂浆中掺入水玻璃作为排水管的接口材料，能有效克服地下水影响，提高了接口工程质量。

2·The accumulation of dry material increased with the increasing of ATNF during jointing and heading stage, furthermore Indica were higher than Japonica.

干物质积累量，拔节期、抽穗期所有供试品种均随施氮量的增加而增加，籼型品种积累量高于粳型品种；