氮肥对高氮效玉米品种干物质累积分配与籽粒含水量的影响

Effects of Nitrogen Fertilizer on Dry Matter Accumulation,Distribution and Grain Water Content of High Nitrogen Efficiency Maize Varieties

以高氮效玉米品种新玉156、先玉335和郑单958为供试材料,研究不施氮(对照)、80%施氮量、100%施氮量(正常施氮量)对高氮效玉米品种干物质累积分配与籽粒含水量的影响。结果表明:与对照相比,80%施氮量处理能够增加3个高氮效品种的株高、茎粗,显著影响成熟期干物质的累积与分配,且表现为先玉335干物质累积量明显高于其他两个品种,郑单958向穗的分配比重明显高于新玉156、先玉335。新玉156、郑单958施氮处理籽粒含水量均低于不施氮处理,且以80%施氮量处理最低,先玉335施氮处理籽粒含水量虽略有增加,但其所有处理的籽粒含水量均明显低于其他两个品种。3个高氮效玉米品种均以80%施氮量处理获得较高籽粒产量,与对照相比,新玉156、先玉335、郑单958分别增产21.05%、5.88%、4.00%。

High nitrogen efficiency maize varieties Xinyu 156,Xianyu 335 and Zhengdan 958 were used as the materials to study the effects of no nitrogen application(CK),80%nitrogen application and 100%nitrogen application(normal nitrogen application)on dry matter accumulation,distribution and grain water content.The results showed that 80%nitrogen application could increase plant height and stem diameter of the three high nitrogen efficiency maize varieties compared with CK,and significantly affect the dry matter accumulation and distribution.The dry matter accumulation of Xianyu 335 was significantly higher than that of the other two varieties,and the distribution proportion to ear of Zhengdan 958 was significantly higher than that of Xinyu 156 and Xianyu 335.The grain water content of Xinyu 156 and Zhengdan 958 of nitrogen application treatments were lower compared with CK,and that of 80%nitrogen application treatment was the lowest.Although the grain water content of Xianyu 335 under nitrogen application treatment increased slightly,it was significantly lower than that of the other two varieties under all the treatments.The three high nitrogen efficiency maize varieties treated with 80%nitrogen application got higher yield,and Xinyu 156,Xianyu 335 and Zhengdan 958 increased by 21.05%,5.88%and 4.00%compared with control,respectively.