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本文重点研究了不同种植模式下不同棉花品种的蒸腾速率、根系生长特性和空间分布规律。结果表明 ,棉花品种本身对蒸腾速率具有比较大的影响 ,同时 ,同一株棉花的叶序叶直接影响到其蒸腾速率。棉花的根系具有比较明显的空间分布 ,在苗期 ,棉花大部分根系分布在 0～ 40 cm土层 ,大部分侧根的分布范围在 0～ 2 0 cm。同时 ,棉花根系特性还受到种植模式的影响 ,地膜覆盖能够促进棉花根系的生长 ,除此以外 ,根系生长特性还与棉花品种有关。在几个供试的棉花品种中 ,中棉所35的根系生长速度最快
This paper focuses on the transpiration rate, root growth characteristics and spatial distribution of different cotton varieties under different cropping patterns. The results showed that the cotton variety itself had a great influence on the transpiration rate. Meanwhile, the leaves of the same cotton plant had a direct influence on the transpiration rate. The root system of cotton had obvious spatial distribution. At the seedling stage, most of the root system of cotton was distributed in 0-40 cm soil layer, most of the lateral roots distributed in the range of 0-20 cm. At the same time, the root characteristics of cotton are also affected by planting patterns. Mulching can promote the growth of cotton roots. In addition, the root growth characteristics are also related to cotton varieties. In several cotton varieties tested, the roots of CIMC 35 grew fastest