应用多变小冠花改土培肥的研究

多变小冠花是多年生草本豆科植物。用于防止水土流失,培肥土壤、饲养牲畜、美化环境等方面,取得了良好的效果,引起了各方面广泛的重视。近年来,正在我国迅速推广应用。本文就多变小冠花对改土培肥的作用及有效利用方式进行论述。通过在多变小冠花地里种植玉米、矮生苹果及梨树的试验;定点测定不同牧草、绿肥种植条件下土壤水分的变化规律,看出: 1.多变小冠花有较强的蓄水保墒能力。 2.种植多变小冠花有利于土壤有机质的积累和氮素供应,有利于疏松土壤、抑制杂草、提高土壤肥力。 3.在多变小冠花复盖下,种植的玉米穗粒多,千粒重高,根系发达,光合面积大,产量显著增加。 4.在矮生果园种植多变小冠花能促进果树早萌发,早开花结果,提高座果率。因此发展多变小冠花是保持水土,培肥土壤的一项有效措施。

A Study of the Application of Crownvetch on Soil Reclamation

Crownvetch is a perennial leguminous plant Since it has a good effect on water-soil coservation, soil fertility improvement,is useful as feeding stuffs and in environment beautification etc.,it has been paidus great attention to in agricultural production in many countries.It'suse has been expanded quickly in recent years in our country. By interplanting corn、dwarfish apple-trees or pear-trees with crownvetch,beneficial effects for the movement of soil moisture during the growing season has been proved as follows: 1. It was found that soil in which corwnvetch was planted is capable of absorbing and containing water,especial in drought seasons or years. 2. It is beneficial to the accumulation of soil organic material,the supply of nitrogan,loosening of soil consistency,Weed control,and thus the increase in soil fertility. 3. With crownvetch sod as a mulch of corn fields the number of grains per ear and the weight of a thousand grains are increased, the root systemis well developed,photosynthetic foliage area and corn yield are increased. 4. In the orchards of dwarf apple and pear with crownvetch sod itis found that crownvetch makes buds germinate earlier than the controls and the fruit bearing ratio is increased.