要想達到水稻高產的目前
，從生理學角度來說，水稻產量=光合勢(葉麵積大小x工作時間)x光合生產率x經濟係數。由此可見葉麵積大小是影響水稻產量的一個重要因素
，葉麵積的大小一般都可以用葉麵積測量儀來進行測量。

　　guoneiwaixuezhedourenwei，shouxianyingcongguangheshishangxiagongfu。guangheshiyouyemianjihegongzuoshijianlianggeyinsujueding。zengjiayemianjizhishubixuzaixuanzeyepianshouliandenaimipinzhongdeqiantixia

，zengjiamiduheshifeishuiping。

　　目前推廣水稻品種多屬平展型，若增加肥力，密度每公頃超過5萬株，葉麵積積指數超過4.0就要引起營養生長過旺
，出現倒伏、空稈、wanshudengnanti，shenzhikenengdaozhijianchan。yinrendanhaoyepianshangju，keyizengjiamiduheyemianjizhishu，danyouyoukangbingxinghuochengshuxingdengqitananti
，yenanyihenkuaidamianjiyingyong。shuidaozhuangfenglingkeyishidukongzhishuidaozhongqiyingyangshengchang，cujinshengzhishengchang。suzaofengchanzhuxing
，biaoxianyepianshoulian，quntitongfengtouguanglianghao，youliyuzengfeizengmizengjiayemianjizhishu

，yanchangyepiangongnengqi，tigaoshuidaorushuqiguangheshi，congertigaoshuidaochanliang。

　　水稻的籽粒產量70%～80%左右來自於抽穗後葉片的光合產物，特別是上部3zhangyepiandeguanghechanwu。xingjukuoda，zaichousuiqixingchengyigelixiangdeguancengjiegou，gaishanquntijingyedekongjianfenbu
，tigaodanweiyemianjideguanghexiaolv
，duitigaochousuihouganwuzhishengchanliangyoumingxianxiaoguo，congerqudegaochan。

　　水稻品種不同，在行距上應區別對待，如源限製品種汕優63.30～33.3cm行距是適宜的，保證了較高的穎花量。而庫限製型品種如鹽粳4號、武育粳3號適宜栽插行距為26.7～30cm為wei宜yi。行xing距ju過guo大da，雖sui然ran抽chou穗sui後hou通tong風feng透tou光guang好hao
，群qun體ti質zhi量liang得de到dao改gai善shan
，但dan抽chou穗sui期qi總zong穎ying花hua量liang偏pian少shao，產chan量liang不bu高gao。在zai推tui廣guang水shui稻dao旱han育yu稀xi植zhi時shi要yao防fang止zhi行xing距ju過guo大da的de傾qing向xiang。

　　zaishiyifanweineikuodazaichaxingju
，kongzhijibenmiaoshu，youliyugaishanquntizhonghouqidetongtouxingheguancengjiegou，youxiaoyemianjilvhegaoxiaoyemianjilvtigao
，shizhizaichousuiqiyoushiyiyemianjizhishuhejiaodaganwuzhijileiliang
，tongshixianzhezengjiadanweimianjiyinghualiang
，qiechousuihouyemianjishuaijianlvxiao，jingtonghualvda，chousuihouganwuzhijileiliangda。zhebujinshizengjiachanliangbiyaodedexingtaijiegoutiaojian，yeshicujinhouqiguangheshengchandeshenglijichu，suoyishidangdikuoxingzaichayouliyugaochan。

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