Lettuce is one of the most popular vegetables from various groups, because it does not need special preparation to enjoy it immediately. Its cultivation is relatively easy and does not require special techniques, making lettuce can be grown in polybags or hydroponically. Rice washing water, which is usually not utilized, actually has the potential as liquid organic fertilizer. Besides being practical and environmentally friendly, liquid organic fertilizer can be applied easily. This study aims to determine the effect of the appropriate application time interval for giving rice washing water on the growth and yield of lettuce. This research was conducted in August-October 2020 using polybags containing soil: manure: husk (1: 1: 1). The design used was a single factor completely randomized block design (RAKL). The factor is the application time interval for giving rice washing water with 4 levels, namely: W0 = without giving rice washing water (control), W1 = once every 2 days, W2 = once every 4 days and W3 = once every 6 days with a dose of 50 ml polybag-1. The results showed that the time interval treatment with washing rice water had no significant effect on plant height, number of leaves, diameter, fresh root weight, and total fresh weight of lettuce plants. However, the treatment of giving rice washing water at an interval of 6 days (W3) once showed a better value than without treatment, the time interval for giving rice washing water once every 2 days or 4 days.

Pakcoy as a type of vegetable that we often encounter on the market. This plant can be cultivated easily, and can be consumed directly or processed into complementary vegetables in meatballs, chicken noodles, and other types of food. Excessive use of chemical fertilizers will cause soil damage in the long term. Reducing chemical fertilizers can be done by giving rice washing water, because usually when washing rice, the water used is just thrown away. In fact, this rice washing water waste has the potential as liquid organic fertilizer. The purpose of this study was to determine the effect of rinsing rice washing water on the growth and yield of pakcoy plants. The research design used a randomized block design (RAK) with a single factor, namely the rice washing water rinse, namely C0 = control, C1 = the first rinse of rice washing water, C2 = the second rinse of rice washing water, and C3 = the third rinse of rice washing water. The parameters observed were plant height, number of leaves, plant diameter, fresh root weight, and total fresh weight. The results showed that rice washing water rinse had no significant effect on all observed parameters. However, C3 treatment has the greatest value for all observations compared to the control treatment, C1, or C2.

Salah satu aspek penting dalam budidaya tanaman adalah pemupukan. Pemupukan yang baik dan berimbang akan berdampak positif bagi kelangsungan tanaman. Penggunaan mikroorganisme lokal ekstrak daging keong mas pada media air kelapa, sebagai pupuk alternatif adalah bentuk teknologi tepat guna dalam mendukung konsep pertanian terpadu dan berkelanjutan. Penelitian ini bertujuan untuk mendapatkan produk formula mikroorganisme lokal ekstrak daging keong mas pada media air kelapa, yang mampu meningkatkan pertumbuhan tanaman. Percobaan ini menggunakan rancangan acak kelompok (RAK) dengan 5 perlakuan, yang terdiri atas kontrol positif (NPK Mutiara), Kontrol negatif (akuades) dan 3 perlakuan penyiraman dengan formula MOL. Indikator pertumbuhan tanaman yang diamati adalah tinggi tanaman, jumlah daun, panjang akar, diameter batang, berat basah dan kering tanaman. Data hasil penelitian dianalisis secara sidik ragam menggunakan aplikasi statistik 8, jika berbeda nyata maka akan diuji lanjut menggunakan LSD pada taraf 5%. Secara keseluruhan, hasil penelitian menunjukkan introduksi MOL ekstrak keong mas pada media air kelapa berbagai konsentrasi, mampu meningkatkan pertumbuhan tanaman. Masing-masing perlakuan memberikan efek yang berbeda dalam meningkatkan pertumbuhan. Analisis sidik ragam terhadap efektivitas Mol ekstrak keong mas pada media air kelapa berbagai konsentrasi sebagai pemacu pertumbuhan, didapatkan perlakuan B (konsentrasi 5%) sebagai perlakuan terbaik. Hal ini terbukti dari kemampuan konsentrasi tersebut dalam meningkatkan tinggi tanaman, panjang akar, berat kering dan basah tanaman tanaman mentimun. Oleh karena itu, perlakuan tersebut berpotensi untuk dikembangkan sebagai biofertilizer, pengganti pupuk kimia sintetis dalam memacu pertumbuhan tanaman dan pemenuhan kebutuhan pemupukan. Kata kunci: biofertilizer, limbah organik cair, mikroorganisme lokal, pertumbuhan tanaman.