摘要
在大田常规施肥条件下，通过对不同熟期的三个青花菜品种从移栽到收获植株养分吸收和干物质积累特性的分析和测定表明：青花菜一生中对各营养元素的最大吸收量顺序由于品种熟期不同而稍有差异，每生产1000kg青花菜吸收的N、P、K、Ca和Ma量分别为1545～20.06kg、1.45～2．51kg、8．98～10．87kg、7.32～9．48kg和1．65～2．40kg；青花菜的吸肥高峰出现在花球形成时；不同器官干物重占植株最大干重的比例顺序均为叶＞花球＞茎＞根，早熟品种玉冠的花球所占比例较高。
?The results of analyzing and determining the features of nutrient absorption and dry matter accumulation of 3 broccoli varieties maturing in different periods from trans-plant to harvest under routine field fertilizer application conditions showed that the descend-ing orders of absorption rates of various nutrient elements in different organs during the whole life period of broccoli varied slightly due to the differences among the maturing periods of 3 test varieties. The amounts of N,P,K,Ca and Mg absorbed by broccoli plants for pro-ducing every 1000 kg of broccoli heads were 15. 45~20.0 6 kg, 1. 45~2. 51 kg,8. 98~10. 87 kg, 7. 32~9. 48 kg and 1. 65 ~ 2. 40 kg, respectively. The peak fertilizer absorption occurred in the head formation period. The descending order of dry weight proportions of different or-gans in the total plant dry weight was as follows:leaves>head>stem>roots,the dry weight proportion of head of the early-maturing variety Yuguan was relatively high compared with the others.
出处
《上海农业学报》
CSCD
1997年第4期47-50,共4页
Acta Agriculturae Shanghai
关键词
青花菜
干物质
积累
养分吸收
Broccoli
Dry matter
Accumulation
Nutrient absorption
