肯尼亚茶园铺加地面复盖物对于土壤持水量和茶树植株持水状况的影响

• 作 者: C.O.Othieno
• 机 构: 东非茶叶研究所,
• 出 处: 茶叶科学简报
• 发表日期: 1981年01期
• 关键词: 土壤持水量 盖物 茶树 紫狼尾草 黑色塑料 土壤含水量 茶苗 持水能力 茶园 肯尼亚

用5种不同的地面复盖物(黑色塑料块、薄石块和3种草)与未加地面复盖物的对照作比较,土壤持水量和无性系茶苗植株持水状况受到了不同影响。在长期干早期间,使用紫狼尾草和黑色塑料块作地面复盖,土壤持水量最高。在90Cm深土层内,在任何一种地面复盖物下的土壤含水量都比未复盖的高。在一个罕见的长期千旱之后雨季开始时,土壤张力计测得的数据指出,在草复盖下土壤的渗透性最快。连续用草复盖4年之后,对于土壤的持水能力效果最显著,但是减少了浅土层的根系,因而使得这种复盖区的茶树更容易受到干旱的危害。

Comparisons of five soil coverings (black plastic blocks, thin blocks and three grasses) with controls without ground cover varied with soil water content and water holding capacity of clonal plantlets . During long dry periods, ground-covered perennials and black plastic blocks provide the highest soil water content. Soil moisture was higher in any depth of 90 cm than in any uncovered area. When a rains began after a rare chronic drought, data from the soil tensiometer showed that soil had the highest permeability under grass cover. After four years of continuous grass coverage, the effect on soil water holding capacity is most significant, but the root system of shallow soil layer is reduced, which makes tea tree in this covered area more vulnerable to drought.