Abstract:

To improve the quality and marketability of substrate cultivated vegetables by using earthworm manure substrate, this experiment studied the effect of earthworm manure soaking on the growth of Chinese cabbage, Brassica napus and Purple celery. We set up 4 treatments of untreated earthworm manure (M), earthworm manure soaking once (M1), earthworm manure soaking three times (M3) and turf substrate (CK). The results showed that compared with turf substrate treatment, earthworm manure substrate significantly increased the yield of vegetables. The average yield increase of the three earthworm manure substrate treatments on Brassica napus, Purple celery and Chinese cabbage was 41.4%, 35.4% and 16.7%, respectively. The response of the three vegetables to earthworm manure soaking treatment was different, and the corresponding degree from large to small was Brassica napus > Chinese cabbage > Purple celery. Compared with untreated earthworm manure treatment, earthworm manure soaking once and three times significantly reduced vegetable yield, but increased VC content. The content of nitrate was significantly reduced by earthworm manure soaking once and three times, which was 7.3% and 8.8% lower than that of non-soaking treatment, respectively, and there was no significant difference between soaking once and three times. It could be concluded that the application of earthworm manure soaking once has better effect in production, which is worthy of popularization.

Key words: nitrate, vegetable, substrate, yield, quality