hongshushitengmancaobenzhiwu，tengmanshipufushengchangde
，jingjiezaiturangzhongyoucishenggenshengcheng。hongshudechanliangshiyushukuaiyouguan，shukuaidachanliangjiugao。shukuaidedaxiaobujinyufeishuiyouguan，erqieyutengmandefanyubufanhefanduofanshaoyouguan。danhongshutengmandefanyubufanyouliangzhongqingkuang

；一種情況是水分充足，一種情況是幹旱。
    第一種；zaishuifenchongzudeqingkuangxia
，jingjiechuyoucishenggenshengcheng，cishenggennengdaliangxishouyangfenheshuifen，shiyingyangshengchangwangsheng，tengmantuchang
，eryizhileshengzhishengchang，shukuaishengchangman，tongshi
，cishenggenyihuichangchuxiaoshukuai


，zheyang，zaochengyangfenbuzu，chuxian“大家都吃不飽”的de現xian象xiang，故gu造zao成cheng紅hong薯shu產chan量liang低di。在zai這zhe種zhong情qing況kuang下xia
，紅hong薯shu藤teng蔓man就jiu要yao經jing常chang翻fan動dong，控kong製zhi次ci生sheng根gen的de生sheng成cheng
，抑yi製zhi徒tu長chang，從cong而er為wei生sheng殖zhi生sheng長chang提ti供gong更geng多duo的de養yang分fen
，使shi薯shu塊kuai快kuai速su生sheng長chang。
    第二種：zaiganhanqueshuideqingkuangxia，jiuyaoshaofandonghuobufandonghongshutengman。zheyang，rangjingjiechudecishenggenshengcheng，weizhizhudeshengchangtigonggengduoshuifenheyangfen
，youliyuzhizhushengchangheshengcun。fouze

，jiubuliyuzhizhudeshengchangheshengcun
，hongshujiuhuijianchan。